.page-faq {
  --faq-gap: clamp(24px, 4vw, 56px);
  background: var(--ink);
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(32px, 6vw, 76px)) 0 clamp(32px, 5vw, 60px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-faq .faq-hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.34;
}

.page-faq .faq-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(102deg, var(--ink) 8%, rgba(5, 7, 12, 0.74) 54%, rgba(5, 7, 12, 0.94) 100%),
    repeating-linear-gradient(90deg, transparent 0 96px, rgba(0, 229, 255, 0.07) 96px 97px);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  max-width: 20em;
  font-size: clamp(30px, 6.2vw, 62px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.page-faq .faq-hero .lead {
  margin-top: 18px;
  max-width: 44em;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.75;
}

.page-faq .faq-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-meta__item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-faq .faq-meta__value {
  font-family: var(--mono);
  font-size: 20px;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding-block: clamp(32px, 6vw, 72px) clamp(48px, 8vw, 96px);
  align-items: start;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-index__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-index__title {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.24em;
  color: var(--muted);
}

.page-faq .faq-index__num {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--cyan-dim);
}

.page-faq .faq-index__list {
  margin: 0;
  padding: 6px 0;
  list-style: none;
}

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

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 11px 18px 11px 14px;
  border-left: 2px solid transparent;
  color: var(--text-soft);
  text-decoration: none;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease), background 0.16s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--text);
  border-left-color: var(--cyan);
  background: var(--panel-2);
}

.page-faq .faq-index__label {
  font-size: 14.5px;
  line-height: 1.4;
}

.page-faq .faq-index__count {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--muted);
}

.page-faq .faq-index__foot {
  margin: 0;
  padding: 14px 18px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--muted);
}

.page-faq .faq-index__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.16s var(--ease);
}

.page-faq .faq-index__foot a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(40px, 6vw, 72px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.page-faq .faq-group__count {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--muted);
  white-space: nowrap;
}

.page-faq .faq-group__intro {
  margin: 14px 0 8px;
  max-width: 42em;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-soft);
}

.page-faq .faq-figure {
  margin: 18px 0 10px;
  max-width: 460px;
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item > summary {
  position: relative;
  display: block;
  padding: 17px 42px 17px 16px;
  list-style: none;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
  transition: color 0.16s var(--ease), background 0.16s var(--ease);
}

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

.page-faq .faq-item > summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: 50% 0;
  transition: transform 0.18s var(--ease);
}

.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 400;
  color: var(--cyan-dim);
  transition: color 0.16s var(--ease), transform 0.18s var(--ease);
}

.page-faq .faq-item:hover > summary,
.page-faq .faq-item[open] > summary {
  background: var(--panel);
}

.page-faq .faq-item:hover > summary::before,
.page-faq .faq-item[open] > summary::before {
  transform: scaleY(1);
}

.page-faq .faq-item:hover > summary::after {
  color: var(--cyan);
}

.page-faq .faq-item[open] > summary::after {
  color: var(--cyan);
  transform: translateY(-50%) rotate(45deg);
}

.page-faq .faq-item__body {
  padding: 2px 42px 20px 16px;
  max-width: 46em;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-soft);
}

.page-faq .faq-item__body p {
  margin: 0;
}

.page-faq .faq-item__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-dim);
  transition: border-color 0.16s var(--ease);
}

.page-faq .faq-item__body a:hover {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .faq-steps li {
  position: relative;
  padding-left: 32px;
  counter-increment: faqstep;
}

.page-faq .faq-steps li + li {
  margin-top: 6px;
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.2em;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--orange);
}

/* ---------- 联系面板 ---------- */
.page-faq .faq-contact {
  display: grid;
  gap: 20px;
  margin-top: 28px;
  padding: clamp(20px, 3.4vw, 34px);
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-contact__kicker {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--cyan);
}

.page-faq .faq-contact__desc {
  margin: 10px 0 0;
  max-width: 30em;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-soft);
}

.page-faq .faq-contact__more {
  display: inline-block;
  margin-top: 12px;
  font-size: 13px;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 3px;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-faq .faq-contact__more:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-contact__label {
  flex: 0 0 44px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-faq .faq-contact__value {
  flex: 1 1 180px;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text);
  text-decoration: none;
  overflow-wrap: anywhere;
}

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

.page-faq .faq-contact__value--text {
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--text-soft);
}

.page-faq .faq-copy {
  margin-left: auto;
  padding: 6px 12px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-soft);
  font-family: var(--sans);
  font-size: 12px;
  line-height: 1.4;
  cursor: pointer;
  transition: border-color 0.16s var(--ease), color 0.16s var(--ease), background 0.16s var(--ease);
}

.page-faq .faq-copy:hover,
.page-faq .faq-copy:focus-visible {
  border-color: var(--cyan);
  color: var(--text);
  background: var(--panel-2);
}

.page-faq .faq-copy[data-copy-state="copied"],
.page-faq .faq-copy[data-copy-state="success"],
.page-faq .faq-copy[data-copy-state="done"] {
  border-color: var(--gain);
  color: var(--gain);
}

.page-faq .faq-top {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 26px;
  padding-bottom: 4px;
  font-size: 13px;
  color: var(--text-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-faq .faq-top::before {
  content: "↑";
  font-family: var(--mono);
  color: var(--cyan-dim);
}

.page-faq .faq-top:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 559px) {
  .page-faq .faq-item > summary {
    font-size: 15px;
    padding-right: 34px;
  }

  .page-faq .faq-item__body {
    padding-right: 20px;
  }

  .page-faq .faq-contact__label {
    flex-basis: 38px;
  }

  .page-faq .faq-copy {
    margin-left: 0;
  }

  .page-faq .faq-figure {
    max-width: 100%;
  }
}

/* ---------- 桌面端：左索引 + 右问答 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 76px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-faq .faq-index__link {
    padding-block: 12px;
  }

  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 28px;
    align-items: start;
  }

  .page-faq .faq-contact__rows {
    border-top: 1px solid var(--line);
  }
}
<<<END>>>