.page-faq {
  --faq-shadow: 8px 8px 0 var(--c-steel);
  --faq-glow: 6px 6px 0 rgba(25, 227, 198, 0.18);
}

.page-faq .faq-top {
  padding-block: 1.5rem 0.75rem;
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(1rem, 3.5vw, 2.5rem) clamp(2rem, 5vw, 3.5rem);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(28, 69, 96, 0.34) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28, 69, 96, 0.34) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 78%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  align-items: center;
}

.page-faq .faq-hero__text h1 {
  margin: 0.4rem 0 0.9rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 8.5vw, 88px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--c-ice);
  overflow-wrap: anywhere;
}

.page-faq .faq-hero__lead {
  max-width: 34ch;
  margin: 0;
  color: var(--c-mist);
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.85;
}

.page-faq .faq-searchhint {
  display: inline-flex;
  align-items: flex-start;
  gap: 0.65rem;
  margin-top: 1.5rem;
  max-width: 40ch;
  padding: 0.8rem 1.05rem;
  border: 2px solid var(--c-cyan);
  background: transparent;
  color: var(--c-ice);
  font-size: 0.9rem;
  line-height: 1.7;
  text-decoration: none;
  transition: background var(--t-fast), color var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast);
}

.page-faq .faq-searchhint:hover,
.page-faq .faq-searchhint:focus-visible {
  background: var(--c-cyan);
  color: var(--c-abyss);
  transform: translate(-2px, -2px);
  box-shadow: var(--faq-glow);
}

.page-faq .faq-searchhint:focus-visible {
  outline: 2px solid var(--c-amber);
  outline-offset: 3px;
}

.page-faq .faq-searchhint__ico {
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1.35;
}

.page-faq .faq-hero__fig {
  margin: 0;
  border: 3px solid var(--c-steel);
  background: var(--c-panel);
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ============ 快速三问 ============ */
.page-faq .faq-quick {
  padding-block: clamp(1.5rem, 4vw, 2.5rem);
  border-top: 2px solid var(--c-steel);
  border-bottom: 2px solid var(--c-steel);
  background: linear-gradient(180deg, rgba(11, 34, 57, 0.55), rgba(6, 24, 38, 0));
}

.page-faq .faq-quick__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 1.25rem;
}

.page-faq .faq-quick__card {
  position: relative;
  display: block;
  padding: 1.2rem 1.2rem 1.2rem 1.45rem;
  border: 2px solid var(--c-steel);
  background: var(--c-panel);
  color: var(--c-ice);
  text-decoration: none;
  transition: border-color var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast);
}

.page-faq .faq-quick__card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: var(--c-cyan);
  transition: background var(--t-fast);
}

.page-faq .faq-quick__card:hover,
.page-faq .faq-quick__card:focus-visible {
  border-color: var(--c-cyan);
  transform: translateY(-3px);
  box-shadow: var(--faq-glow);
}

.page-faq .faq-quick__card:focus-visible {
  outline: 2px solid var(--c-amber);
  outline-offset: 3px;
}

.page-faq .faq-quick__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--c-amber);
}

.page-faq .faq-quick__q {
  display: block;
  margin-top: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.page-faq .faq-quick__meta {
  display: block;
  margin-top: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--c-mist);
}

/* ============ 主体：索引 + 问答 ============ */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  padding-block: clamp(1.75rem, 4vw, 2.75rem) clamp(3rem, 6vw, 5rem);
  min-width: 0;
}

.page-faq .faq-index {
  border: var(--line);
  background: var(--c-panel);
  padding: 1rem 0.9rem;
  min-width: 0;
}

.page-faq .faq-index__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--c-mist);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.15rem;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.55rem 0.55rem 0.55rem 0.65rem;
  border-left: 3px solid transparent;
  color: var(--c-ice);
  font-size: 0.92rem;
  line-height: 1.5;
  text-decoration: none;
  transition: border-color var(--t-fast), background var(--t-fast), color var(--t-fast);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-left-color: var(--c-cyan);
  background: rgba(25, 227, 198, 0.08);
  color: var(--c-cyan-soft);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--c-amber);
  outline-offset: 2px;
}

.page-faq .faq-index__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--c-cyan);
}

.page-faq .faq-groups {
  display: grid;
  gap: clamp(2.25rem, 5vw, 3.75rem);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 6rem;
  min-width: 0;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  padding-bottom: 0.7rem;
  margin-bottom: 1.05rem;
  border-bottom: 3px solid var(--c-steel);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.2vw, 34px);
  line-height: 1.18;
  color: var(--c-ice);
  overflow-wrap: anywhere;
}

.page-faq .faq-group__head .section-no {
  flex: none;
  color: transparent;
  -webkit-text-stroke: 2px var(--c-cyan);
  text-stroke: 2px var(--c-cyan);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1;
}

.page-faq .faq-group__intro {
  max-width: 56ch;
  margin: 0 0 1.2rem;
  color: var(--c-mist);
  font-size: 1rem;
  line-height: 1.85;
}

.page-faq .faq-group__fig {
  margin: 0 0 1.4rem;
  border: 2px solid var(--c-steel);
  background: var(--c-panel);
  overflow: hidden;
}

.page-faq .faq-group__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ============ 问答条目 ============ */
.page-faq .qa {
  border: 2px solid var(--c-steel);
  background: var(--c-panel);
  margin-bottom: 0.7rem;
  transition: border-color var(--t-fast);
}

.page-faq .qa[open] {
  border-color: var(--c-cyan);
}

.page-faq .qa__sum {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding: 1rem 1.05rem;
  cursor: pointer;
  list-style: none;
  color: var(--c-ice);
}

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

.page-faq .qa__sum:focus-visible {
  outline: 2px solid var(--c-amber);
  outline-offset: -2px;
}

.page-faq .qa__sum::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--c-amber);
}

.page-faq .qa[open] .qa__sum::after {
  content: "–";
  color: var(--c-cyan);
}

.page-faq .qa__no {
  flex: none;
  padding-top: 0.12rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--c-cyan);
}

.page-faq .qa__q {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.55;
  overflow-wrap: anywhere;
  transition: color var(--t-fast);
}

.page-faq .qa[open] .qa__q {
  color: var(--c-cyan-soft);
}

.page-faq .qa__ans {
  margin: 0 1.05rem 1.2rem;
  padding-left: 0.95rem;
  border-left: 3px solid var(--c-cyan-soft);
  color: var(--c-mist);
  font-size: 0.97rem;
  line-height: 1.9;
  max-width: 58ch;
  overflow-wrap: anywhere;
}

/* ============ 联系卡 ============ */
.page-faq .faq-contact {
  margin-top: 1.6rem;
  padding: clamp(1.15rem, 3vw, 1.8rem);
  border: 3px solid var(--c-amber);
  background: var(--c-panel);
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-contact__label {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--c-amber);
}

.page-faq .faq-contact__rows {
  display: grid;
  gap: 0.65rem;
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px dashed var(--c-steel);
}

.page-faq .faq-contact__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-contact__key {
  flex: none;
  min-width: 5.5rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--c-mist);
}

.page-faq .faq-contact__val {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--c-ice);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__btn {
  margin-top: 1.3rem;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick__card,
  .page-faq .faq-searchhint,
  .page-faq .qa,
  .page-faq .qa__q {
    transition: none;
  }
  .page-faq .faq-quick__card:hover,
  .page-faq .faq-quick__card:focus-visible,
  .page-faq .faq-searchhint:hover,
  .page-faq .faq-searchhint:focus-visible {
    transform: none;
  }
}

/* ============ 断点 ============ */
@media (min-width: 720px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 1.08fr 0.92fr;
    gap: clamp(2rem, 4vw, 3.5rem);
  }

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

  .page-faq .faq-contact__row {
    flex-wrap: nowrap;
  }

  .page-faq .faq-contact__val {
    margin-left: auto;
    text-align: right;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(2rem, 3vw, 3rem);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 5.5rem;
  }

  .page-faq .qa__sum {
    padding: 1.1rem 1.25rem;
  }

  .page-faq .qa__q {
    font-size: 1.05rem;
  }

  .page-faq .qa__ans {
    margin: 0 1.25rem 1.35rem;
  }
}
<<<END>>>