.page-faq {
  --faq-body: #C7D0E8;
  --faq-dim: #8E9AC4;
  --faq-cyan-line: rgba(53, 242, 208, .42);
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-sans);
  line-height: 1.75;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 26px 0 0;
  font-family: var(--font-narrow);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mist);
}
.page-faq .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color .16s ease, border-color .16s ease;
}
.page-faq .breadcrumb a:hover {
  color: var(--cy);
  border-color: var(--cy);
}
.page-faq .breadcrumb span[aria-current="page"] { color: var(--paper); }

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(34px, 6vw, 74px);
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--line);
}
.page-faq .faq-hero h1 {
  margin: 16px 0 0;
  max-width: 15em;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--fs-display);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--paper);
}
.page-faq .lede,
.page-faq .faq-lede {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: clamp(.95rem, 1.15vw, 1.05rem);
  line-height: 1.85;
  color: var(--faq-body);
}
.page-faq .faq-hero__marks {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-hero__marks li {
  padding: 7px 13px;
  border: 1px solid var(--line);
  background: var(--ink-800);
  font-family: var(--font-narrow);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cy);
}

/* ---------- 问题分类 ---------- */
.page-faq .faq-cats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 28px;
}
.page-faq .faq-cat {
  display: block;
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  background: var(--ink-800);
  color: var(--paper);
  text-decoration: none;
  transition: border-color .18s ease, transform .18s ease;
}
.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible {
  border-color: var(--cy);
  transform: translateY(-3px);
}
.page-faq .faq-cat__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1;
  color: var(--orange);
}
.page-faq .faq-cat__title {
  display: block;
  margin-top: 14px;
  font-family: var(--font-serif);
  font-size: 1.06rem;
  line-height: 1.5;
}
.page-faq .faq-cat__desc {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--faq-dim);
}

/* ---------- 场景栅格 ---------- */
.page-faq .faq-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
}
.page-faq .faq-flow__side {
  display: grid;
  gap: 18px;
  align-content: start;
}

/* ---------- 步骤编号列 ---------- */
.page-faq .faq-steps {
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-step {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 18px;
  padding-bottom: 28px;
}
.page-faq .faq-step::after {
  content: "";
  position: absolute;
  left: 21px;
  top: 50px;
  bottom: 6px;
  border-left: 1px dashed var(--faq-cyan-line);
}
.page-faq .faq-step:last-child { padding-bottom: 0; }
.page-faq .faq-step:last-child::after { display: none; }
.page-faq .faq-step__no {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--ink-950);
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--cy);
}
.page-faq .faq-step__body h3 {
  margin: 9px 0 6px;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--paper);
}
.page-faq .faq-step__body p {
  margin: 0;
  max-width: 52ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--faq-dim);
}

/* ---------- 侧注 ---------- */
.page-faq .faq-note {
  padding: 2px 0 2px 16px;
  border-left: 2px solid var(--orange);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--faq-dim);
}
.page-faq .faq-note strong {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-narrow);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--orange);
}
.page-faq .faq-note p { margin: 0; }
.page-faq .faq-note + .faq-note { border-left-color: var(--cy); }
.page-faq .faq-note + .faq-note strong { color: var(--cy); }

/* ---------- 图片框 ---------- */
.page-faq .media-frame {
  position: relative;
  margin: 32px 0 0;
  border: 1px solid var(--line);
  background: var(--ink-950);
  overflow: hidden;
}
.page-faq .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .3;
  background-image:
    linear-gradient(rgba(36, 48, 96, .9) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 48, 96, .9) 1px, transparent 1px);
  background-size: 46px 46px;
}
.page-faq .media-caption {
  position: relative;
  z-index: 1;
  padding: 11px 14px;
  border-top: 1px solid var(--line);
  background: var(--ink-950);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--faq-dim);
}

/* ---------- 行内链接 ---------- */
.page-faq .faq-inline-link {
  margin: 28px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--faq-dim);
}
.page-faq .faq-inline-link a {
  color: var(--cy);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-cyan-line);
}
.page-faq .faq-inline-link a:hover { border-bottom-color: var(--cy); }

/* ---------- 折叠问答 ---------- */
.page-faq .faq-qa {
  margin-top: 30px;
  border-top: 1px solid var(--line);
}
.page-faq .faq-qa details {
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-qa summary {
  position: relative;
  padding: 20px 46px 20px 0;
  list-style: none;
  cursor: pointer;
  font-size: .98rem;
  font-weight: 600;
  line-height: 1.7;
  color: var(--paper);
  transition: color .16s ease;
}
.page-faq .faq-qa summary::-webkit-details-marker { display: none; }
.page-faq .faq-qa summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cy);
}
.page-faq .faq-qa details[open] summary::after { content: "-"; }
.page-faq .faq-qa summary:hover { color: var(--cy); }
.page-faq .faq-qa__body {
  padding: 0 40px 22px 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--faq-dim);
}
.page-faq .faq-qa__body a {
  color: var(--cy);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-cyan-line);
}
.page-faq .faq-qa__body a:hover { border-bottom-color: var(--cy); }

/* ---------- 联系区块 ---------- */
.page-faq .faq-contact {
  position: relative;
  margin: 0 12px 30px 0;
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--black);
  box-shadow: var(--shadow-paper);
}
.page-faq .faq-contact .section-label { color: #5A6486; }
.page-faq .faq-contact .section-title {
  margin-top: 10px;
  color: var(--ink-950);
}
.page-faq .faq-contact__lede {
  margin: 16px 0 0;
  max-width: 54ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: #3A4360;
}

.page-faq .copy-field {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-top: 26px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: var(--ink-900);
}
.page-faq .copy-field-label {
  width: 100%;
  font-family: var(--font-narrow);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mist);
}
.page-faq .copy-field-value {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cy);
  word-break: break-all;
}
.page-faq .copy-field-hint {
  width: 100%;
  font-size: 12px;
  color: var(--mist);
}
.page-faq .faq-copy-btn {
  padding: 9px 16px;
  border: 1px solid var(--cy);
  background: transparent;
  font-family: var(--font-narrow);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cy);
  cursor: pointer;
  transition: background-color .16s ease, color .16s ease, border-color .16s ease;
}
.page-faq .faq-copy-btn:hover { background: var(--cy); color: var(--ink-950); }
.page-faq .faq-copy-btn.is-copied {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink-950);
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-faq .faq-actions .btn {
  display: inline-block;
  padding: 12px 22px;
  border: 1px solid var(--ink-950);
  background: transparent;
  font-family: var(--font-narrow);
  font-size: 13px;
  letter-spacing: .12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-950);
  transition: background-color .16s ease, color .16s ease, border-color .16s ease;
}
.page-faq .faq-actions .btn--accent {
  background: var(--orange);
  border-color: var(--orange);
}
.page-faq .faq-actions .btn:hover {
  background: var(--ink-950);
  color: var(--paper);
}
.page-faq .faq-actions .btn--accent:hover {
  background: var(--violet);
  border-color: var(--violet);
  color: var(--paper);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-cats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1000px) {
  .page-faq .faq-cats { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .page-faq .faq-flow {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 58px;
  }
  .page-faq .faq-flow__side { padding-top: 96px; }
}

@media (max-width: 520px) {
  .page-faq .faq-step {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 12px;
  }
  .page-faq .faq-step__no {
    width: 36px;
    height: 36px;
    font-size: 12px;
  }
  .page-faq .faq-step::after {
    left: 17px;
    top: 42px;
  }
  .page-faq .faq-step__body h3 { margin-top: 5px; }
  .page-faq .faq-contact { margin-right: 0; }
  .page-faq .faq-qa__body { padding-right: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat,
  .page-faq .faq-copy-btn,
  .page-faq .faq-actions .btn,
  .page-faq .faq-qa summary {
    transition: none;
  }
  .page-faq .faq-cat:hover { transform: none; }
}