.page-faq {
  background-color: var(--ink);
  background-image:
    linear-gradient(to right, rgba(44, 69, 92, 0.26) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(44, 69, 92, 0.16) 1px, transparent 1px);
  background-size: 88px 88px;
  color: var(--paper);
  padding-bottom: clamp(48px, 8vw, 104px);
  overflow-x: clip;
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: clamp(18px, 4vw, 34px);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-faq .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t), border-color var(--t);
}

.page-faq .breadcrumb a:hover {
  color: var(--amber-soft);
  border-bottom-color: var(--amber);
}

.page-faq .breadcrumb [aria-current="page"] {
  color: var(--amber);
}

/* ---------- hero ---------- */

.page-faq .faq-hero {
  padding-block: clamp(26px, 5vw, 54px) clamp(8px, 2vw, 18px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-faq .eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--amber);
  margin: 0;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(32px, 7.6vw, 62px);
  line-height: 1.16;
  letter-spacing: 0.005em;
  margin: 14px 0 18px;
  color: var(--paper);
}

.page-faq .faq-hero .lede {
  font-size: clamp(14px, 3.8vw, 17px);
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.84;
  max-width: 46ch;
  margin: 0 0 20px;
}

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

.page-faq .tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 5px 10px;
  color: var(--mist);
  border: 1px solid var(--wire);
  background: rgba(11, 27, 43, 0.6);
}

.page-faq .tag--amber {
  color: var(--amber);
  border-color: rgba(201, 151, 74, 0.55);
}

.page-faq .tag--celadon {
  color: var(--celadon);
  border-color: rgba(79, 124, 106, 0.6);
}

.page-faq .media-frame {
  margin: 0;
  border: 1px solid var(--wire);
  background: var(--ink-deep);
  overflow: hidden;
}

.page-faq .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.9) brightness(0.88);
  transition: filter var(--t);
}

.page-faq .media-frame:hover img {
  filter: saturate(1) brightness(0.98);
}

.page-faq .media-caption {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist);
  padding: 9px 13px;
  border-top: 1px solid var(--wire);
}

/* ---------- quick index ---------- */

.page-faq .faq-quick {
  padding-block: clamp(24px, 4vw, 40px);
}

.page-faq .faq-quick__title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--mist);
  margin: 0 0 12px;
}

.page-faq .faq-quick__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--wire);
  border: 1px solid var(--wire);
}

.page-faq .faq-quick__item {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 16px;
  background: rgba(11, 27, 43, 0.9);
  color: var(--paper);
  text-decoration: none;
  transition: background var(--t), color var(--t);
}

.page-faq .faq-quick__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--amber);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--t);
}

.page-faq .faq-quick__item:hover,
.page-faq .faq-quick__item:focus-visible {
  background: rgba(18, 42, 64, 0.95);
  color: var(--amber-soft);
}

.page-faq .faq-quick__item:hover::before,
.page-faq .faq-quick__item:focus-visible::before {
  transform: scaleY(1);
}

.page-faq .faq-quick__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber);
  flex: 0 0 auto;
  min-width: 32px;
}

.page-faq .faq-quick__label {
  font-size: 14px;
  line-height: 1.5;
}

/* ---------- .page-faq ---------- */

.page-faq .faq-body {
  padding-block: clamp(20px, 4vw, 44px);
}

.page-faq .faq-body__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-faq .faq-index {
  border-top: 1px solid var(--amber);
  padding-top: 14px;
}

.page-faq .faq-index__title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--mist);
  margin: 0 0 12px;
}

.page-faq .faq-index__nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex: 0 0 auto;
  white-space: nowrap;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid var(--wire);
  background: rgba(11, 27, 43, 0.7);
  transition: color var(--t), border-color var(--t), background var(--t);
}

.page-faq .faq-index__link span {
  color: var(--amber);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--paper);
  border-color: var(--amber);
  background: rgba(18, 42, 64, 0.92);
}

.page-faq .faq-list {
  min-width: 0;
}

.page-faq .faq-group {
  margin-bottom: clamp(26px, 5vw, 46px);
  scroll-margin-top: 88px;
}

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

.page-faq .faq-group__title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(19px, 4.4vw, 26px);
  line-height: 1.35;
  color: var(--paper);
  margin: 0;
  padding-bottom: 11px;
  border-bottom: 1px solid var(--amber);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--amber);
  flex: 0 0 auto;
}

.page-faq .faq-item {
  border-bottom: 1px solid rgba(44, 69, 92, 0.72);
  scroll-margin-top: 88px;
}

.page-faq .faq-item > summary {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 34px 15px 2px;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
  transition: color var(--t);
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 12px;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--amber);
}

.page-faq .faq-item[open] > summary::after {
  content: "−";
}

.page-faq .faq-item > summary:hover,
.page-faq .faq-item > summary:focus-visible {
  color: var(--amber-soft);
}

.page-faq .faq-item__num {
  flex: 0 0 auto;
  min-width: 32px;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-faq .faq-item__q {
  font-size: clamp(15px, 3.9vw, 16.5px);
  line-height: 1.6;
  font-weight: 500;
}

.page-faq .faq-item__a {
  margin: 0 0 15px;
  padding: 13px 14px 13px 16px;
  background: linear-gradient(180deg, var(--glass), rgba(11, 27, 43, 0.5));
  border-left: 1px solid var(--amber);
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: clamp(14px, 3.6vw, 15px);
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.86;
}

.page-faq .faq-item > summary:focus-visible,
.page-faq .faq-quick__item:focus-visible,
.page-faq .faq-index__link:focus-visible,
.page-faq .copy-btn:focus-visible,
.page-faq .btn:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

/* ---------- help ---------- */

.page-faq .faq-help {
  border-top: 1px solid var(--wire);
  padding-top: clamp(30px, 6vw, 54px);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-faq .faq-help__title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(24px, 5.6vw, 38px);
  line-height: 1.3;
  margin: 0 0 14px;
  color: var(--paper);
}

.page-faq .faq-help__lede {
  font-size: clamp(14px, 3.8vw, 16px);
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.82;
  margin: 0 0 18px;
  max-width: 44ch;
}

.page-faq .faq-contact {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  border-top: 1px solid var(--wire);
}

.page-faq .contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(44, 69, 92, 0.72);
}

.page-faq .contact-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
  min-width: 40px;
}

.page-faq .contact-val {
  font-family: var(--font-mono);
  font-size: clamp(13px, 3.6vw, 16px);
  letter-spacing: 0.03em;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .copy-btn {
  margin-left: auto;
  padding: 4px 11px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--amber);
  background: transparent;
  border: 1px solid var(--amber);
  cursor: pointer;
  transition: background var(--t), color var(--t);
}

.page-faq .copy-btn:hover {
  background: var(--amber);
  color: var(--ink);
}

.page-faq .copy-btn[data-copied]::after {
  content: " 已复制";
}

.page-faq .faq-help__note {
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
  margin: 0 0 18px;
  max-width: 46ch;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
}

.page-faq .faq-help__actions .btn {
  display: inline-block;
  padding: 11px 20px;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: background var(--t), color var(--t), border-color var(--t);
}

.page-faq .faq-help__actions .btn--solid {
  background: var(--amber);
  color: var(--ink);
  border: 1px solid var(--amber);
}

.page-faq .faq-help__actions .btn--solid:hover {
  background: var(--amber-soft);
  border-color: var(--amber-soft);
}

.page-faq .faq-help__actions .btn--ghost {
  background: transparent;
  color: var(--amber);
  border: 1px solid rgba(201, 151, 74, 0.6);
}

.page-faq .faq-help__actions .btn--ghost:hover {
  background: rgba(201, 151, 74, 0.12);
  border-color: var(--amber);
}

/* ---------- responsive ---------- */

@media (max-width: 479px) {
  .page-faq .faq-item > summary {
    gap: 9px;
    padding-right: 28px;
  }

  .page-faq .faq-item__num {
    min-width: 28px;
  }

  .page-faq .faq-item__a {
    padding-left: 12px;
  }

  .page-faq .contact-val {
    flex: 1 1 auto;
  }
}

@media (min-width: 640px) {
  .page-faq .faq-quick__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: end;
    gap: clamp(32px, 5vw, 68px);
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.78fr);
    align-items: center;
  }

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

@media (min-width: 1000px) {
  .page-faq .faq-body__grid {
    grid-template-columns: 250px minmax(0, 1fr);
    align-items: start;
    gap: clamp(32px, 4vw, 60px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 28px;
  }

  .page-faq .faq-index__nav {
    flex-direction: column;
    overflow: visible;
    gap: 0;
    padding-bottom: 0;
  }

  .page-faq .faq-index__link {
    padding: 11px 2px;
    border: none;
    border-bottom: 1px solid rgba(44, 69, 92, 0.7);
    background: transparent;
    white-space: normal;
    font-size: 12px;
    letter-spacing: 0.04em;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: transparent;
    color: var(--amber-soft);
    border-bottom-color: var(--amber);
  }

  .page-faq .faq-item__a {
    padding: 15px 20px 15px 46px;
  }
}
<<<END>>>