.page-faq {
  background: var(--ink);
  color: var(--white);
}

.page-faq .faq-hero {
  border-bottom: 1px solid var(--grid);
  background:
    linear-gradient(180deg, rgba(23, 179, 196, .07) 0%, rgba(5, 14, 31, 0) 62%),
    var(--ink);
}

.page-faq .faq-hero__in {
  padding-top: clamp(30px, 5vw, 58px);
  padding-bottom: clamp(24px, 3.6vw, 40px);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(1.9rem, 4.6vw, 3.1rem);
  line-height: 1.16;
  letter-spacing: -.02em;
  font-weight: 800;
  max-width: 18em;
}

.page-faq .faq-hero .lede {
  margin: 18px 0 0;
  max-width: 34em;
  color: var(--mute);
  font-size: 16.5px;
  line-height: 1.78;
}

.page-faq .faq-facts {
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-faq .faq-facts > div {
  background: var(--panel);
  padding: 14px 16px 16px;
  min-width: 0;
}

.page-faq .faq-facts dt {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--mute);
}

.page-faq .faq-facts dd {
  margin: 8px 0 0;
  font-family: var(--mono);
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  line-height: 1;
  color: var(--qing);
  font-weight: 700;
}

.page-faq .faq-facts__u {
  font-size: .48em;
  margin-left: .18em;
  color: var(--mute);
}

.page-faq .faq-facts__ver {
  color: var(--gold);
}

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding-top: clamp(26px, 4vw, 44px);
  padding-bottom: clamp(56px, 7vw, 88px);
}

/* ---------- 左侧目录 ---------- */

.page-faq .faq-toc__title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--mute);
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: max-content;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-toc__link {
  display: block;
  padding: 8px 12px;
  border: 1px solid var(--grid);
  background: var(--panel);
  color: var(--mute);
  font-size: 14px;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--tick), border-color var(--tick), background-color var(--tick);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--white);
  border-color: var(--qing);
  background: rgba(23, 179, 196, .1);
}

.page-faq .faq-toc__foot {
  margin: 16px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--grid);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mute);
}

.page-faq .faq-toc__foot a {
  color: var(--qing);
  text-decoration: none;
  border-bottom: 1px solid rgba(23, 179, 196, .45);
}

.page-faq .faq-toc__foot a:hover,
.page-faq .faq-toc__foot a:focus-visible {
  border-bottom-color: var(--qing);
}

/* ---------- 问题区块 ---------- */

.page-faq .faq-body {
  display: grid;
  gap: clamp(40px, 6vw, 68px);
  min-width: 0;
}

.page-faq .faq-sec {
  scroll-margin-top: calc(var(--head-h) + 24px);
  min-width: 0;
}

.page-faq .faq-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-sec__num {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--qing);
  flex: none;
}

.page-faq .faq-sec__title {
  margin: 0;
  font-size: clamp(1.25rem, 2.6vw, 1.7rem);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.3;
}

.page-faq .faq-sec__note {
  margin: 16px 0 0;
  max-width: 36em;
  color: var(--mute);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-faq .faq-sec__note a,
.page-faq .faq-a a,
.page-faq .faq-step__body a {
  color: var(--qing);
  text-decoration: none;
  border-bottom: 1px solid rgba(23, 179, 196, .45);
}

.page-faq .faq-sec__note a:hover,
.page-faq .faq-a a:hover,
.page-faq .faq-step__body a:hover {
  border-bottom-color: var(--qing);
}

/* ---------- 三步上手 ---------- */

.page-faq .faq-steps {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-faq .faq-step {
  background: var(--panel);
  padding: 20px 18px;
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-faq .faq-step__n {
  font-family: var(--mono);
  font-size: 26px;
  line-height: 1;
  color: var(--qing);
  font-weight: 700;
  letter-spacing: .02em;
}

.page-faq .faq-step__t {
  margin: 0;
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: -.005em;
}

.page-faq .faq-step__body p {
  margin: 10px 0 0;
  max-width: 38em;
  color: var(--mute);
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- 字段 + 图示 ---------- */

.page-faq .faq-duo {
  margin-top: 22px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: start;
}

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

.page-faq .faq-field {
  display: grid;
  grid-template-columns: minmax(72px, 92px) minmax(0, 1fr);
  gap: 12px;
  padding: 13px 0 14px;
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-field__k {
  font-weight: 700;
  font-size: 15px;
  color: var(--white);
  line-height: 1.6;
}

.page-faq .faq-field__v {
  color: var(--mute);
  font-size: 14.5px;
  line-height: 1.72;
}

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

.page-faq .faq-fig--band {
  margin-top: 24px;
}

.page-faq .faq-fig .pic {
  border: 1px solid var(--grid);
  background: var(--panel);
}

.page-faq .faq-fig img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-faq .faq-fig .figure__cap {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  line-height: 1.7;
  color: var(--mute);
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-list {
  margin-top: 22px;
  display: grid;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-faq .faq-duo + .faq-list,
.page-faq .faq-fig + .faq-list {
  margin-top: 26px;
}

.page-faq .faq-item {
  background: var(--panel);
}

.page-faq .faq-q {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--white);
  transition: background-color var(--tick), padding-left var(--tick);
}

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

.page-faq .faq-q::after {
  content: "+";
  flex: none;
  font-family: var(--mono);
  font-size: 19px;
  line-height: 1;
  color: var(--qing);
}

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

.page-faq .faq-q:hover {
  background: rgba(23, 179, 196, .08);
  padding-left: 22px;
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--qing);
  outline-offset: -2px;
}

.page-faq .faq-a {
  padding: 0 18px 18px;
  border-top: 1px solid var(--grid-soft);
}

.page-faq .faq-a p {
  margin: 14px 0 0;
  max-width: 38em;
  color: var(--mute);
  font-size: 15px;
  line-height: 1.78;
}

/* ---------- 邮箱复制 ---------- */

.page-faq .faq-contact {
  margin-top: 22px;
  border: 1px solid var(--grid);
  border-left: 3px solid var(--qing);
  background: var(--panel);
  padding: 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.page-faq .faq-contact__t {
  margin: 0;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--mute);
}

.page-faq .faq-contact__v {
  margin: 8px 0 0;
  font-size: clamp(.92rem, 2.4vw, 1.05rem);
  color: var(--white);
  word-break: break-all;
}

.page-faq .faq-contact__btn {
  flex: none;
}

/* ---------- 设备建议 ---------- */

.page-faq .faq-devices {
  margin-top: 22px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-faq .faq-device {
  background: var(--panel);
  padding: 20px 18px;
}

.page-faq .faq-device__t {
  margin: 0;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--grid);
  font-size: 15.5px;
  font-weight: 700;
  color: var(--qing);
}

.page-faq .faq-device__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-device__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mute);
}

.page-faq .faq-device__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 6px;
  height: 6px;
  background: var(--mint);
}

/* ---------- 出口 ---------- */

.page-faq .faq-out {
  border: 1px solid var(--grid);
  border-top: 2px solid var(--qing);
  background:
    linear-gradient(135deg, rgba(23, 179, 196, .12) 0%, rgba(11, 26, 49, 0) 58%),
    var(--panel);
  padding: clamp(22px, 3.4vw, 34px);
}

.page-faq .faq-out__t {
  margin: 0;
  font-size: clamp(1.2rem, 2.6vw, 1.6rem);
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-faq .faq-out__d {
  margin: 14px 0 0;
  max-width: 36em;
  color: var(--mute);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-faq .faq-out__acts {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-faq .faq-duo {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 34px;
  }

  .page-faq .faq-step {
    padding: 24px 22px;
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 18px;
  }

  .page-faq .faq-q {
    padding: 18px 22px;
  }

  .page-faq .faq-q:hover {
    padding-left: 26px;
  }

  .page-faq .faq-a {
    padding: 0 22px 22px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-shell {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 52px;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--head-h) + 26px);
    align-self: start;
    max-height: calc(100vh - var(--head-h) - 52px);
    overflow-y: auto;
    padding-right: 4px;
  }

  .page-faq .faq-toc__list {
    grid-auto-flow: row;
    grid-auto-columns: auto;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-toc__link {
    border: 0;
    border-left: 1px solid var(--grid);
    background: transparent;
    padding: 9px 10px 9px 14px;
    white-space: normal;
    transition: color var(--tick), border-color var(--tick), transform var(--tick);
  }

  .page-faq .faq-toc__link:hover,
  .page-faq .faq-toc__link:focus-visible {
    background: transparent;
    border-left-color: var(--qing);
    transform: translateX(3px);
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-shell {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-toc__link,
  .page-faq .faq-q {
    transition: none;
  }

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

  .page-faq .faq-q:hover {
    padding-left: 18px;
  }
}
<<<END>>>