.page-faq {
  --faq-paper-link: #8A3E00;
  --faq-grid: rgba(24, 39, 64, .55);
  position: relative;
  isolation: isolate;
  overflow-x: hidden;
  background: var(--ink);
  color: var(--silver);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  padding: 0 0 72px;
}

.page-faq::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--faq-grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--faq-grid) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 92% 62% at 50% 0%, #000 18%, transparent 76%);
  mask-image: radial-gradient(ellipse 92% 62% at 50% 0%, #000 18%, transparent 76%);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: 34px 0 40px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 0 0 20px;
  max-width: 16em;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(30px, 8.4vw, 66px);
  line-height: 1.02;
  letter-spacing: -.01em;
  color: var(--white);
}

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

.page-faq .faq-hero__lead {
  margin: 0 0 22px;
  max-width: 46em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--silver);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--cyan);
}

.page-faq .faq-hero__meta .bw-mono {
  font-size: 13px;
  letter-spacing: .02em;
}

/* ---------- 分区通用 ---------- */
.page-faq .bw-section {
  padding: 44px 0 6px;
}

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(23px, 5.4vw, 32px);
  line-height: 1.14;
  letter-spacing: -.005em;
  color: var(--white);
}

.page-faq .bw-section__note {
  margin: 12px 0 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--silver);
}

/* ---------- 三步流程 ---------- */
.page-faq .faq-flow {
  padding-top: 40px;
}

.page-faq .faq-flow__track {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
}

.page-faq .faq-flow__step {
  position: relative;
  padding: 18px 0 20px 32px;
  border-left: 1px solid var(--line);
}

.page-faq .faq-flow__step::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 26px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(44, 242, 214, .12);
}

.page-faq .faq-flow__link {
  display: block;
  text-decoration: none;
  color: inherit;
}

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

.page-faq .faq-flow__num {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-faq .faq-flow__label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.2;
  color: var(--white);
  transition: color .2s var(--ease);
}

.page-faq .faq-flow__desc {
  display: block;
  font-size: 15px;
  line-height: 1.72;
  color: var(--silver);
}

.page-faq .faq-flow__fig {
  margin: 26px 0 0;
}

.page-faq .faq-flow__fig .bw-figure__media {
  aspect-ratio: 1600 / 700;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel);
}

.page-faq .faq-flow__fig .bw-figure__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ---------- 问答列表 ---------- */
.page-faq .faq-list {
  margin-top: 20px;
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-q {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 17px 34px 17px 2px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.42;
  color: var(--white);
  transition: color .2s var(--ease);
}

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

.page-faq .faq-q::after {
  content: "";
  position: absolute;
  right: 10px;
  top: 50%;
  width: 9px;
  height: 9px;
  margin-top: -7px;
  border-right: 1.5px solid var(--orange);
  border-bottom: 1.5px solid var(--orange);
  transform: rotate(45deg);
  transition: transform .22s var(--ease), margin-top .22s var(--ease);
}

.page-faq .faq-item[open] > .faq-q::after {
  margin-top: -2px;
  transform: rotate(-135deg);
}

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

.page-faq .faq-q__idx {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: .06em;
  color: var(--silver);
  transition: color .2s var(--ease);
}

.page-faq .faq-item[open] > .faq-q .faq-q__idx {
  color: var(--cyan);
}

.page-faq .faq-a {
  padding: 0 0 22px;
}

.page-faq .faq-a__box {
  padding: 16px 18px;
  border-radius: var(--r-sm);
  background: var(--paper);
  color: var(--paper-ink);
  font-size: 15px;
  line-height: 1.82;
}

.page-faq .faq-a__box p {
  margin: 0 0 10px;
}

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

.page-faq .faq-a__box .bw-link {
  color: var(--faq-paper-link);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-a__box .bw-link:visited {
  color: #5B4A3A;
}

/* ---------- 数字对照双列 ---------- */
.page-faq .faq-compare {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: 22px;
  border: 1px solid var(--line);
  background: var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-faq .faq-compare__col {
  background: var(--panel);
  padding: 18px 18px 20px;
}

.page-faq .faq-compare__col--fix {
  background: #0C1A2E;
}

.page-faq .faq-compare__h {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--white);
}

.page-faq .faq-compare__h::before {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
}

.page-faq .faq-compare__col--fix .faq-compare__h::before {
  background: var(--cyan);
}

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

.page-faq .faq-compare__list li {
  position: relative;
  padding-left: 17px;
  margin-bottom: 13px;
  font-size: 15px;
  line-height: 1.76;
  color: var(--silver);
}

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

.page-faq .faq-compare__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 8px;
  height: 1px;
  background: var(--line);
}

.page-faq .faq-mismatch__foot {
  margin-top: 22px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-faq .faq-mismatch__fig {
  margin: 0;
}

.page-faq .faq-mismatch__fig .bw-figure__media {
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel);
}

.page-faq .faq-mismatch__fig .bw-figure__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-faq .faq-mismatch__note p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--silver);
}

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

.page-faq .faq-mismatch__mono {
  padding-left: 12px;
  border-left: 2px solid var(--amber);
  color: var(--amber);
  font-size: 13px;
}

/* ---------- 尾部 ---------- */
.page-faq .faq-tail {
  margin-top: 52px;
  padding: 28px 22px 30px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--r-md);
  background: linear-gradient(140deg, rgba(255, 122, 31, .07), rgba(5, 10, 22, 0) 62%), var(--panel);
}

.page-faq .faq-tail__title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(21px, 4.6vw, 28px);
  line-height: 1.2;
  color: var(--white);
}

.page-faq .faq-tail__text {
  margin: 0 0 20px;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
}

.page-faq .faq-tail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

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

/* ---------- 平板以上 ---------- */
@media (min-width: 760px) {
  .page-faq {
    padding-bottom: 96px;
  }

  .page-faq .faq-hero {
    padding: 58px 0 52px;
  }

  .page-faq .bw-section {
    padding-top: 58px;
  }

  .page-faq .faq-flow__track {
    grid-template-columns: repeat(3, 1fr);
    gap: 0 26px;
    margin-top: 34px;
  }

  .page-faq .faq-flow__step {
    padding: 22px 0 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .page-faq .faq-flow__step::before {
    left: 0;
    top: -5px;
  }

  .page-faq .faq-compare {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .faq-mismatch__foot {
    grid-template-columns: 5fr 7fr;
    gap: 26px;
    align-items: start;
  }

  .page-faq .faq-q {
    padding: 20px 38px 20px 2px;
    font-size: 19px;
  }

  .page-faq .faq-a {
    padding: 0 0 26px 36px;
  }

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

  .page-faq .faq-tail {
    padding: 36px 34px 38px;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-hero__title {
    max-width: 13em;
  }

  .page-faq .faq-flow__label {
    font-size: 23px;
  }

  .page-faq .faq-q {
    font-size: 20px;
  }

  .page-faq .faq-a__box {
    font-size: 16px;
  }
}

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