.page-faq {
  --faq-ink-soft: #46536B;
  --faq-num-on-paper: #857C6C;
  --faq-cyan-soft: rgba(55, 230, 208, 0.38);
  --faq-link-on-paper: #0E7A70;
  --faq-radius: 26px;
  overflow-x: clip;
  background: var(--ink-900);
  color: var(--text-hi);
  font-family: var(--font-sans);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  padding-block: 24px 40px;
  background:
    radial-gradient(130% 90% at 6% -12%, rgba(55, 230, 208, 0.16), transparent 60%),
    radial-gradient(90% 70% at 102% 4%, rgba(255, 107, 44, 0.11), transparent 62%),
    linear-gradient(180deg, var(--ink-800), var(--ink-900) 84%);
}

.page-faq .faq-hero .eyebrow {
  margin-top: 22px;
  color: var(--cyan-400);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  max-width: 16em;
  font-size: clamp(2.3rem, 8.6vw, 4.9rem);
  font-weight: 800;
  line-height: 0.96;
  letter-spacing: -0.025em;
  color: var(--text-hi);
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 36em;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--text-lo);
}

.page-faq .faq-search {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  max-width: 720px;
  min-height: 64px;
  margin-top: 26px;
  padding: 12px 18px;
  border: 1px solid var(--ink-700);
  border-radius: 22px 22px 22px 8px;
  background: rgba(19, 28, 46, 0.9);
  color: var(--text-lo);
  font-family: inherit;
  font-size: 0.9375rem;
  line-height: 1.4;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out), color 0.3s var(--ease-out);
}

.page-faq .faq-search:hover,
.page-faq .faq-search:focus-visible {
  border-color: var(--cyan-400);
  color: var(--text-hi);
  box-shadow: 0 0 0 4px rgba(55, 230, 208, 0.12);
  outline: none;
}

.page-faq .faq-search__icon {
  flex: none;
  color: var(--cyan-400);
}

.page-faq .faq-search__label {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.page-faq .faq-search__hint {
  flex: none;
  padding: 4px 10px;
  border: 1px solid var(--faq-cyan-soft);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: var(--cyan-400);
}

.page-faq .faq-hero__media {
  margin-top: 34px;
  border: 1px solid var(--ink-700);
  border-radius: var(--faq-radius) var(--faq-radius) var(--faq-radius) 8px;
  overflow: hidden;
  background: var(--ink-800);
}

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

/* ---------- 分带 ---------- */
.page-faq .faq-band {
  padding-block: 48px;
  border-top: 1px solid var(--ink-700);
}

.page-faq .faq-band--steps {
  border-top: none;
}

.page-faq .faq-band__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  align-items: start;
  margin-bottom: 26px;
}

.page-faq .faq-band__index {
  grid-row: 1;
  padding-top: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
}

.page-faq .faq-band__title {
  grid-column: 2;
  margin: 0;
  font-size: clamp(1.5rem, 5.4vw, 2.2rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--text-hi);
}

.page-faq .faq-band__intro {
  grid-column: 2;
  margin: 0;
  max-width: 40em;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--text-lo);
}

/* ---------- 三步自检 ---------- */
.page-faq .step-track {
  display: grid;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-faq .step-track__item {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--ink-700);
  border-radius: var(--faq-radius) var(--faq-radius) var(--faq-radius) 8px;
  background:
    linear-gradient(160deg, rgba(55, 230, 208, 0.08), transparent 58%),
    var(--ink-800);
}

.page-faq .step-track__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--cyan-400);
}

.page-faq .step-track__title {
  margin: 10px 0 0;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-hi);
}

.page-faq .step-track__text {
  margin: 8px 0 0;
  font-size: 0.875rem;
  line-height: 1.85;
  color: var(--text-lo);
}

.page-faq .step-track__text a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-cyan-soft);
}

.page-faq .step-track__text a:hover {
  border-bottom-color: var(--cyan-400);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0 0 26px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--paper-300);
  border-radius: var(--faq-radius) var(--faq-radius) var(--faq-radius) 8px;
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 0.75rem;
  line-height: 1.75;
  letter-spacing: 0.02em;
  color: var(--faq-num-on-paper);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 0;
}

.page-faq .faq-item {
  position: relative;
  border-top: 1px solid var(--ink-700);
  transition: background-color 0.3s var(--ease-out);
}

.page-faq .faq-item:last-child {
  border-bottom: 1px solid var(--ink-700);
}

.page-faq .faq-item[open] {
  background: rgba(19, 28, 46, 0.55);
}

.page-faq .faq-item[open]::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan-400), transparent);
}

.page-faq .faq-item__summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  min-height: 58px;
  padding: 18px 16px 18px 12px;
  list-style: none;
  cursor: pointer;
}

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

.page-faq .faq-item__summary:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: -2px;
  border-radius: 10px;
}

.page-faq .faq-item__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--text-lo);
  transition: color 0.25s var(--ease-out);
}

.page-faq .faq-item[open] .faq-item__num {
  color: var(--cyan-400);
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text-hi);
}

.page-faq .faq-item__mark {
  flex: none;
  align-self: center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  margin-left: auto;
  border: 1px solid var(--ink-700);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  line-height: 1;
  color: var(--text-lo);
  transition: color 0.25s var(--ease-out), border-color 0.25s var(--ease-out), transform 0.25s var(--ease-out);
}

.page-faq .faq-item[open] .faq-item__mark {
  color: var(--cyan-400);
  border-color: var(--cyan-400);
  transform: rotate(45deg);
}

.page-faq .faq-item__body {
  padding: 0 18px 24px 34px;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--text-lo);
}

.page-faq .faq-answer__lead {
  margin: 0 0 10px;
  font-weight: 600;
  color: var(--text-hi);
}

.page-faq .faq-answer__steps {
  display: grid;
  gap: 5px;
  margin: 0;
  padding-left: 1.15em;
}

.page-faq .faq-answer__steps li::marker {
  color: var(--teal-600);
  font-family: var(--font-mono);
  font-size: 0.85em;
}

.page-faq .faq-item__help {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 8px;
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-cyan-soft);
}

.page-faq .faq-item__help:hover,
.page-faq .faq-item__help:focus-visible {
  border-bottom-color: var(--cyan-400);
  outline: none;
}

/* ---------- 暖纸阅读区：版本核对 ---------- */
.page-faq .faq-band--paper {
  background:
    radial-gradient(120% 80% at 100% 0%, rgba(111, 227, 176, 0.18), transparent 58%),
    var(--paper-100);
  color: var(--ink-900);
  border-top-color: var(--paper-300);
}

.page-faq .faq-band--paper .faq-band__index {
  color: var(--teal-600);
}

.page-faq .faq-band--paper .faq-band__title {
  color: var(--ink-900);
}

.page-faq .faq-band--paper .faq-band__intro {
  color: var(--faq-ink-soft);
}

.page-faq .faq-band--paper .faq-item {
  border-color: var(--paper-300);
}

.page-faq .faq-band--paper .faq-item:last-child {
  border-bottom-color: var(--paper-300);
}

.page-faq .faq-band--paper .faq-item[open] {
  background: rgba(207, 197, 180, 0.22);
}

.page-faq .faq-band--paper .faq-item[open]::before {
  background: linear-gradient(180deg, var(--teal-600), transparent);
}

.page-faq .faq-band--paper .faq-item__num {
  color: var(--faq-num-on-paper);
}

.page-faq .faq-band--paper .faq-item[open] .faq-item__num {
  color: var(--teal-600);
}

.page-faq .faq-band--paper .faq-item__q {
  color: var(--ink-900);
}

.page-faq .faq-band--paper .faq-item__mark {
  border-color: var(--paper-300);
  color: var(--faq-num-on-paper);
}

.page-faq .faq-band--paper .faq-item[open] .faq-item__mark {
  border-color: var(--teal-600);
  color: var(--teal-600);
}

.page-faq .faq-band--paper .faq-item__body {
  color: var(--faq-ink-soft);
}

.page-faq .faq-band--paper .faq-answer__lead {
  color: var(--ink-900);
}

.page-faq .faq-band--paper .faq-item__help {
  color: var(--faq-link-on-paper);
  border-bottom-color: rgba(14, 122, 112, 0.35);
}

.page-faq .faq-band--paper .faq-item__help:hover,
.page-faq .faq-band--paper .faq-item__help:focus-visible {
  border-bottom-color: var(--faq-link-on-paper);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  padding-block: 52px 68px;
  border-top: 1px solid var(--ink-700);
  background:
    linear-gradient(150deg, rgba(255, 107, 44, 0.12), transparent 58%),
    var(--ink-800);
}

.page-faq .faq-cta__box {
  padding-left: 20px;
  border-left: 2px solid var(--orange-500);
}

.page-faq .faq-cta .eyebrow {
  color: var(--amber-400);
}

.page-faq .faq-cta__title {
  margin: 12px 0 0;
  max-width: 18em;
  font-size: clamp(1.5rem, 5.2vw, 2.1rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-hi);
}

.page-faq .faq-cta__text {
  margin: 14px 0 0;
  max-width: 38em;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--text-lo);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-cta__actions .btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding-block: 36px 56px;
  }

  .page-faq .faq-hero__lede {
    font-size: 1.0625rem;
  }

  .page-faq .faq-hero__media {
    margin-top: 40px;
  }

  .page-faq .faq-band {
    padding-block: 60px;
  }

  .page-faq .faq-band__head {
    gap: 6px 20px;
    margin-bottom: 32px;
  }

  .page-faq .faq-item__summary {
    padding: 20px 22px 20px 16px;
  }

  .page-faq .faq-item__body {
    padding: 0 26px 26px 42px;
    max-width: 60em;
  }

  .page-faq .faq-figure img {
    max-height: 420px;
  }
}

@media (min-width: 900px) {
  .page-faq .step-track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-faq .step-track__item::after {
    content: "";
    position: absolute;
    top: 50%;
    right: -22px;
    width: 22px;
    height: 1px;
    background: linear-gradient(90deg, var(--cyan-400), rgba(55, 230, 208, 0));
  }

  .page-faq .step-track__item:last-child::after {
    display: none;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-band {
    padding-block: 76px;
  }

  .page-faq .faq-band__head {
    grid-template-columns: 68px minmax(0, 1fr);
    gap: 6px 24px;
  }

  .page-faq .faq-band__index {
    padding-top: 10px;
    font-size: 0.8125rem;
  }

  .page-faq .faq-band__intro {
    font-size: 1rem;
  }

  .page-faq .faq-item__summary {
    padding: 22px 28px 22px 22px;
  }

  .page-faq .faq-item__body {
    padding: 0 30px 28px 58px;
  }

  .page-faq .faq-figure {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: end;
    gap: 24px;
  }

  .page-faq .faq-figure figcaption {
    margin-top: 0;
    padding-bottom: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-search,
  .page-faq .faq-item,
  .page-faq .faq-item__num,
  .page-faq .faq-item__mark {
    transition: none;
  }

  .page-faq .faq-item[open] .faq-item__mark {
    transform: none;
  }
}