.page-faq {
  --faq-quiet: rgba(238, 245, 234, 0.74);
  --faq-line: rgba(147, 167, 155, 0.24);
  --faq-gap: 22px;
  background: var(--c-ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 26px 0 42px;
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(120% 150% at 88% -20%, rgba(200, 255, 61, 0.12) 0%, rgba(11, 31, 25, 0) 58%),
    var(--c-ink);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -30%;
  top: -10%;
  width: 78%;
  height: 130%;
  background: linear-gradient(180deg, rgba(200, 255, 61, 0.13), rgba(200, 255, 61, 0) 72%);
  clip-path: polygon(26% 0, 100% 0, 74% 100%, 0 100%);
  pointer-events: none;
}

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

.page-faq .faq-hero-grid {
  display: grid;
  gap: 26px;
  margin-top: 18px;
}

.page-faq .faq-hero-copy h1 {
  margin: 10px 0 0;
  font-size: clamp(2rem, 7.6vw, 4.2rem);
  font-weight: 900;
  line-height: 1.07;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}

.page-faq .faq-lead {
  margin: 18px 0 0;
  max-width: 40em;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--faq-quiet);
}

.page-faq .faq-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-quick-link {
  display: inline-block;
  padding: 7px 15px;
  border: 1px solid var(--line-mid);
  border-radius: 999px;
  background: var(--c-glass);
  color: var(--c-paper);
  font-size: 0.85rem;
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.page-faq .faq-quick-link:hover,
.page-faq .faq-quick-link:focus-visible {
  border-color: var(--c-lime);
  color: var(--c-lime);
  transform: translateY(-2px);
}

.page-faq .faq-quick-link:focus-visible {
  outline: 2px solid var(--c-lime);
  outline-offset: 2px;
}

.page-faq .faq-hero-figure {
  margin: 0;
}

.page-faq .faq-hero-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line-mid);
  border-radius: var(--radius);
  filter: saturate(1.06) contrast(1.04);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding: 34px 0 70px;
}

.page-faq .faq-index-title {
  margin: 0 0 12px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--c-mist);
}

.page-faq .faq-index-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  overflow-x: auto;
  list-style: none;
  scrollbar-width: none;
}

.page-faq .faq-index-list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  color: var(--faq-quiet);
  font-size: 0.86rem;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.page-faq .faq-index-link::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-mist);
  flex: none;
  transition: background-color 0.18s ease;
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  border-color: var(--c-lime);
  color: var(--c-lime);
}

.page-faq .faq-index-link:hover::before,
.page-faq .faq-index-link:focus-visible::before {
  background: var(--c-lime);
}

.page-faq .faq-index-link:focus-visible {
  outline: 2px solid var(--c-lime);
  outline-offset: 2px;
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  padding-bottom: 36px;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--header-h) + 26px);
}

.page-faq .faq-section:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: none;
}

.page-faq .faq-section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-faq .faq-section-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  color: var(--c-lime);
}

.page-faq .faq-section-head h2 {
  margin: 0;
  font-size: clamp(1.4rem, 4.4vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

.page-faq .faq-section:target .faq-section-head h2 {
  color: var(--c-lime);
}

.page-faq .faq-intro {
  margin: 14px 0 0;
  max-width: 44em;
  font-size: 0.97rem;
  line-height: 1.8;
  color: var(--faq-quiet);
}

/* ---------- 字段定义表 ---------- */
.page-faq .field-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 22px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--line-soft);
}

.page-faq .field-item {
  padding: 14px 16px;
  background: var(--c-ink);
}

.page-faq .field-term {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--c-lime);
}

.page-faq .field-desc {
  margin: 7px 0 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--faq-quiet);
}

.page-faq .faq-field-figure {
  margin: 22px 0 0;
}

.page-faq .faq-field-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
}

/* ---------- 步骤 ---------- */
.page-faq .steps {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: faq-step;
}

.page-faq .steps li {
  position: relative;
  padding: 0 0 20px 48px;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--faq-quiet);
}

.page-faq .steps li:last-child {
  padding-bottom: 0;
}

.page-faq .steps li::before {
  counter-increment: faq-step;
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--c-lime);
}

.page-faq .steps li::after {
  content: "";
  position: absolute;
  left: 13px;
  top: 26px;
  bottom: 0;
  width: 1px;
  background: var(--faq-line);
}

.page-faq .steps li:last-child::after {
  display: none;
}

.page-faq .steps strong {
  color: var(--c-paper);
  font-weight: 700;
}

.page-faq .steps a {
  color: var(--c-lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 问答折叠 ---------- */
.page-faq .faq-qa {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.page-faq .faq-item {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--c-green);
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-item:hover {
  border-color: var(--line-mid);
}

.page-faq .faq-item[open] {
  border-color: rgba(200, 255, 61, 0.42);
  background: rgba(20, 52, 42, 0.92);
}

.page-faq .faq-q {
  position: relative;
  display: block;
  padding: 14px 46px 14px 16px;
  font-size: 0.97rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--c-paper);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-q::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--c-lime);
}

.page-faq .faq-item[open] .faq-q::after {
  content: "\2212";
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--c-lime);
  outline-offset: -2px;
  border-radius: var(--radius);
}

.page-faq .faq-item[open] .faq-q {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-a {
  padding: 14px 16px 16px;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--faq-quiet);
}

.page-faq .faq-a p {
  margin: 0 0 0.7em;
}

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

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

.page-faq .faq-a a:hover,
.page-faq .faq-a a:focus-visible {
  color: var(--c-lime-soft);
}

/* ---------- 兜底联系 ---------- */
.page-faq .faq-cta {
  margin-top: 20px;
  padding: 22px 20px;
  border-left: 3px solid var(--c-orange);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: rgba(122, 58, 18, 0.26);
}

.page-faq .faq-cta-text {
  margin: 0 0 16px;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--faq-quiet);
}

.page-faq .faq-cta-text:last-of-type {
  margin-bottom: 18px;
}

.page-faq .faq-cta-text a {
  color: var(--c-lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-mail {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--c-lime);
  word-break: break-all;
}

.page-faq .faq-cta .btn {
  display: inline-block;
  text-decoration: none;
}

/* ---------- 桌面 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero {
    padding: 34px 0 54px;
  }

  .page-faq .faq-hero::after {
    right: -12%;
    width: 56%;
  }

  .page-faq .field-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-cta {
    padding: 26px 26px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
    gap: 44px;
  }

  .page-faq .faq-hero-img {
    aspect-ratio: 7 / 3;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 52px;
    padding: 46px 0 88px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 30px);
    align-self: start;
    padding-right: 20px;
    border-right: 1px solid var(--line-soft);
  }

  .page-faq .faq-index-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index-link {
    width: 100%;
    padding: 9px 12px;
    border-color: transparent;
    background: transparent;
  }

  .page-faq .faq-index-link::before {
    background: var(--c-green);
    box-shadow: inset 0 0 0 1px var(--line-mid);
  }

  .page-faq .field-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .field-item {
    padding: 16px 18px;
  }

  .page-faq .faq-a,
  .page-faq .faq-q {
    padding-left: 22px;
    padding-right: 22px;
  }

  .page-faq .faq-q::after {
    right: 22px;
  }
}

@media (min-width: 1200px) {
  .page-faq .field-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick-link,
  .page-faq .faq-item,
  .page-faq .faq-index-link {
    transition: none;
  }

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