.page-faq {
  --faq-gap: clamp(22px, 4vw, 44px);
  --faq-pad-y: clamp(48px, 7vw, 88px);
  background: var(--paper);
  color: var(--graphite);
}

/* ---------- 版本标识条 ---------- */
.page-faq .faq-versionbar {
  background: var(--sea-800);
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .faq-versionbar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  min-height: 48px;
  padding-top: 8px;
  padding-bottom: 8px;
}

.page-faq .faq-versionbar__dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 199, 0.16);
}

.page-faq .faq-versionbar__text {
  flex: 1 1 220px;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(244, 247, 250, 0.82);
}

.page-faq .faq-versionbar__link {
  margin-left: auto;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 199, 0.42);
  padding-bottom: 1px;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .faq-versionbar__link:hover,
.page-faq .faq-versionbar__link:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--sea-800);
  padding: clamp(40px, 6.5vw, 84px) 0 clamp(46px, 7vw, 92px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -34%;
  right: -16%;
  width: 62vw;
  height: 62vw;
  max-width: 700px;
  max-height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle at center, rgba(0, 229, 199, 0.2), rgba(0, 229, 199, 0) 62%);
  pointer-events: none;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--cyan) 20%, rgba(0, 229, 199, 0) 64%);
  opacity: 0.75;
}

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

.page-faq .faq-hero__crumb {
  margin-bottom: 26px;
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: rgba(244, 247, 250, 0.55);
}

.page-faq .faq-hero__crumb a {
  color: rgba(244, 247, 250, 0.88);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 199, 0.42);
}

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

.page-faq .faq-hero__crumb span[aria-hidden] {
  margin: 0 8px;
  color: rgba(244, 247, 250, 0.34);
}

.page-faq .faq-hero__eyebrow {
  margin: 0;
  color: var(--cyan-soft);
}

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  max-width: 17ch;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.05rem, 5.4vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(244, 247, 250, 0.76);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 42px;
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-stat {
  display: grid;
  gap: 4px;
}

.page-faq .faq-stat__value {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-faq .faq-stat__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.7rem, 3.6vw, 2.2rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-faq .faq-stat__unit {
  font-size: 13px;
  color: var(--cyan-soft);
}

.page-faq .faq-stat__label {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: rgba(244, 247, 250, 0.5);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

/* ---------- 通用区块间距 ---------- */
.page-faq .faq-dl,
.page-faq .faq-qa {
  padding: var(--faq-pad-y) 0;
}

.page-faq .faq-dl {
  background: var(--paper);
}

.page-faq .faq-qa {
  background: var(--paper);
  border-top: 1px solid var(--line-light);
}

.page-faq .faq-dl__head,
.page-faq .faq-qa__head {
  margin-bottom: clamp(30px, 4.5vw, 52px);
}

/* ---------- 文档下载区 ---------- */
.page-faq .faq-dl__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
}

.page-faq .faq-dl__group {
  padding-bottom: 22px;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--line-light);
}

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

.page-faq .faq-dl__grouphead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 10px;
}

.page-faq .faq-dl__grouptitle {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
  color: var(--sea-800);
}

.page-faq .faq-dl__count {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--steel);
  white-space: nowrap;
}

.page-faq .faq-dl__items {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-dl__item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line-light);
  font-size: 15px;
}

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

.page-faq .faq-dl__name {
  flex: 1 1 auto;
  min-width: 0;
  color: var(--graphite);
  line-height: 1.55;
}

.page-faq .faq-dl__meta {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex: 0 0 auto;
}

.page-faq .faq-tag {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  border: 1px solid rgba(10, 43, 78, 0.2);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel);
  white-space: nowrap;
}

.page-faq .faq-tag--zip {
  border-color: rgba(255, 122, 69, 0.55);
  color: var(--orange);
}

.page-faq .faq-dl__size {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--steel);
  white-space: nowrap;
}

.page-faq .faq-dl__aside {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-faq .faq-dl__figure {
  margin: 0;
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--sea-900);
  box-shadow: var(--shadow-1);
}

.page-faq .faq-dl__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 7;
  object-fit: cover;
}

.page-faq .faq-dl__caption {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--steel);
}

.page-faq .faq-dl__note {
  padding: 18px 20px;
  border-radius: var(--radius-m);
  border-left: 3px solid var(--cyan);
  background: rgba(0, 229, 199, 0.07);
}

.page-faq .faq-dl__notecap {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-faq .faq-dl__note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--graphite);
}

/* ---------- 问答区 ---------- */
.page-faq .faq-qa__banner {
  display: block;
  margin: 0 0 clamp(28px, 4vw, 44px);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--sea-900);
}

.page-faq .faq-qa__banner img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 200px;
  object-fit: cover;
  opacity: 0.9;
}

.page-faq .faq-qa__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
}

.page-faq .faq-qa__indexcap {
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-light);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-faq .faq-qa__indexlist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-faq .faq-qa__indexlink {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 12px;
  border-radius: var(--radius-s);
  border-left: 2px solid transparent;
  font-size: 14px;
  color: var(--graphite);
  text-decoration: none;
  transition: color 180ms var(--ease), background 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .faq-qa__indexlink:hover,
.page-faq .faq-qa__indexlink:focus-visible {
  color: var(--sea-800);
  background: rgba(0, 229, 199, 0.09);
  border-left-color: var(--cyan);
}

.page-faq .faq-qa__idxnum {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-faq .faq-qa__group {
  margin-bottom: clamp(30px, 4.5vw, 46px);
}

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

.page-faq .faq-qa__grouptitle {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 6px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--sea-800);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--sea-800);
}

.page-faq .faq-qa__grouptitle::before {
  content: "";
  flex: 0 0 auto;
  width: 18px;
  height: 3px;
  border-radius: 2px;
  background: var(--cyan);
}

.page-faq .faq-qa__groupnum {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--steel);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line-light);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin: 0;
  padding: 19px 4px 19px 16px;
  list-style: none;
  cursor: pointer;
  border-left: 3px solid transparent;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--graphite);
  transition: border-color 220ms var(--ease), color 220ms var(--ease), background 220ms var(--ease);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q:hover {
  background: rgba(10, 43, 78, 0.035);
}

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

.page-faq .faq-item__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__q::after {
  content: "";
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 5px;
  margin-left: auto;
  color: var(--steel);
  background-image: linear-gradient(90deg, currentColor 0 100%), linear-gradient(0deg, currentColor 0 100%);
  background-position: center center, center center;
  background-size: 14px 1.5px, 1.5px 14px;
  background-repeat: no-repeat;
  transition: background-size 240ms var(--ease), color 240ms var(--ease);
}

.page-faq .faq-item[open] > .faq-item__q {
  border-left-color: var(--cyan);
  color: var(--sea-800);
  font-weight: 600;
}

.page-faq .faq-item[open] > .faq-item__q::after {
  color: var(--cyan);
  background-size: 14px 1.5px, 1.5px 0;
}

.page-faq .faq-item__a {
  padding: 0 4px 22px 19px;
}

.page-faq .faq-item[open] > .faq-item__a {
  animation: faq-answer-in 260ms var(--ease) both;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--graphite);
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 没找到答案 ---------- */
.page-faq .faq-help {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  padding: var(--faq-pad-y) 0;
}

.page-faq .faq-help::after {
  content: "";
  position: absolute;
  left: -12%;
  bottom: -46%;
  width: 54vw;
  height: 54vw;
  max-width: 620px;
  max-height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle at center, rgba(0, 229, 199, 0.14), rgba(0, 229, 199, 0) 60%);
  pointer-events: none;
}

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

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
}

.page-faq .faq-help__index {
  color: var(--cyan-soft);
}

.page-faq .faq-help__title {
  margin: 16px 0 16px;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.6rem, 3.6vw, 2.5rem);
  line-height: 1.18;
  color: var(--paper);
}

.page-faq .faq-help__lead {
  margin: 0;
  max-width: 46ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(244, 247, 250, 0.72);
}

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

.page-faq .faq-help__step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-help__step:last-child {
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .faq-help__stepnum {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-help__stepbody strong {
  display: block;
  margin-bottom: 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .faq-help__stepbody p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(244, 247, 250, 0.7);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

.page-faq .faq-help__actions .btn--ghost {
  color: var(--cyan-soft);
  border-color: rgba(0, 229, 199, 0.42);
}

.page-faq .faq-help__actions .btn--ghost:hover,
.page-faq .faq-help__actions .btn--ghost:focus-visible {
  color: var(--paper);
  border-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-dl__items {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 30px;
  }

  .page-faq .faq-dl__item:nth-last-child(2):nth-child(odd) {
    border-bottom: 0;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-dl__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: clamp(30px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-qa__layout {
    grid-template-columns: minmax(190px, 236px) minmax(0, 1fr);
    gap: clamp(30px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-qa__index {
    position: sticky;
    top: 26px;
  }

  .page-faq .faq-qa__indexlist {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-faq .faq-qa__indexlink {
    width: 100%;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: clamp(36px, 5vw, 64px);
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero__lead {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] > .faq-item__a {
    animation: none;
  }

  .page-faq .faq-item__q,
  .page-faq .faq-item__q::after,
  .page-faq .faq-qa__indexlink,
  .page-faq .faq-versionbar__link {
    transition: none;
  }

  .page-faq .faq-hero::after,
  .page-faq .faq-help::after {
    display: none;
  }
}