.page-faq {
  --faq-cut: 14px;
  --faq-line-light: rgba(13, 44, 77, .14);
  --faq-ink-soft: #31485c;
  background: var(--space-blue);
  color: var(--mist);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-faq .faq-shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.page-faq .mono {
  font-family: var(--font-mono);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + 30px) 0 52px;
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(59, 60, 143, .58), transparent 62%),
    radial-gradient(80% 70% at 0% 100%, rgba(255, 107, 26, .18), transparent 66%),
    linear-gradient(162deg, #07182B 0%, #0D2C4D 100%);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 38%;
  right: -18%;
  bottom: -70px;
  height: 180px;
  background: linear-gradient(90deg, transparent, rgba(255, 107, 26, .55), transparent);
  transform: rotate(-8deg);
  opacity: .45;
  pointer-events: none;
}

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

.page-faq .breadcrumbs {
  font-size: 13px;
  letter-spacing: .04em;
}

.page-faq .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  color: var(--silver);
}

.page-faq .breadcrumbs li + li::before {
  content: "/";
  margin-right: 6px;
  color: rgba(195, 208, 220, .45);
}

.page-faq .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid rgba(195, 208, 220, .4);
}

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

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

.page-faq .faq-hero__grid {
  display: grid;
  gap: 30px;
}

.page-faq .faq-hero__main .eyebrow {
  color: var(--orange);
  font-size: 12px;
  letter-spacing: .18em;
  margin: 0 0 10px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -.02em;
  margin: 0 0 18px;
  max-width: 16em;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 38em;
  font-size: clamp(15px, 3.6vw, 17px);
  line-height: 1.78;
  color: var(--silver);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-faq .faq-jump__item {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 16px;
  font-size: 14.5px;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid var(--line-strong);
  background: rgba(7, 24, 43, .55);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-jump__item .mono {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: .06em;
}

.page-faq .faq-jump__item:hover,
.page-faq .faq-jump__item:focus-visible {
  background: var(--orange);
  border-color: var(--orange);
  color: #08131f;
}

.page-faq .faq-jump__item:hover .mono,
.page-faq .faq-jump__item:focus-visible .mono {
  color: #08131f;
}

.page-faq .faq-board {
  display: grid;
  gap: 14px;
  padding: 20px 22px;
  background: rgba(7, 24, 43, .62);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
}

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

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

.page-faq .faq-board__num {
  flex: 0 0 auto;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--mint);
  white-space: nowrap;
}

.page-faq .faq-board__row span:last-child {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--silver);
}

/* ---------- 快速开始 ---------- */
.page-faq .faq-start {
  padding: 54px 0 46px;
  background: var(--midnight);
}

.page-faq .faq-section-head .eyebrow {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--mint);
}

.page-faq .faq-section-head h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 5.2vw, 2.4rem);
  line-height: 1.16;
  letter-spacing: -.015em;
  margin: 0 0 12px;
  color: var(--mist);
}

.page-faq .faq-section-head__lead {
  margin: 0 0 30px;
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--silver);
}

.page-faq .faq-start__grid {
  display: grid;
  gap: 28px;
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-steps__item {
  position: relative;
  padding: 18px 20px 18px 62px;
  background: rgba(7, 24, 43, .6);
  border: 1px solid var(--line);
  border-left: 3px solid rgba(52, 214, 165, .55);
}

.page-faq .faq-steps__item .mono {
  position: absolute;
  left: 18px;
  top: 19px;
  font-size: 15px;
  font-weight: 700;
  color: var(--mint);
}

.page-faq .faq-steps__title {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -.01em;
  color: var(--mist);
  margin-bottom: 6px;
}

.page-faq .faq-steps__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--silver);
}

.page-faq .faq-start__figure,
.page-faq .faq-specs__figure {
  margin: 0;
}

.page-faq .faq-start__figure img,
.page-faq .faq-specs__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line-strong);
}

.page-faq .faq-start__figure figcaption,
.page-faq .faq-specs__figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(195, 208, 220, .8);
}

.page-faq .faq-path {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 30px;
  opacity: .7;
}

/* ---------- 双栏问答 ---------- */
.page-faq .faq-main {
  padding: 52px 0 60px;
  background: var(--paper);
  color: var(--ink);
}

.page-faq .faq-main__grid {
  display: grid;
  gap: 30px;
}

.page-faq .faq-side__label {
  margin: 0 0 14px;
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: #5b7183;
}

.page-faq .faq-side__list {
  display: flex;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-side__list li {
  flex: 0 0 auto;
}

.page-faq .faq-side__list a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  font-size: 14.5px;
  white-space: nowrap;
  color: var(--ink);
  text-decoration: none;
  background: #fff;
  border: 1px solid var(--faq-line-light);
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-side__list a .mono {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--orange-deep);
  letter-spacing: .06em;
}

.page-faq .faq-side__list a:hover,
.page-faq .faq-side__list a:focus-visible {
  border-color: var(--orange);
  background: rgba(255, 107, 26, .08);
  color: var(--orange-deep);
}

.page-faq .faq-side__hint {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: #5b7183;
  max-width: 24em;
}

.page-faq .faq-col__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.6vw, 2rem);
  line-height: 1.2;
  letter-spacing: -.015em;
  margin: 0 0 26px;
  color: var(--ink);
}

.page-faq .faq-group {
  margin-bottom: 34px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

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

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--faq-line-light);
}

.page-faq .faq-group__no {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--orange-deep);
}

.page-faq .faq-group__head h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.1rem, 3.4vw, 1.4rem);
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .faq-item {
  border-bottom: 1px solid rgba(13, 44, 77, .1);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 0 15px 15px;
  list-style: none;
  cursor: pointer;
  border-left: 3px solid rgba(13, 44, 77, .16);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

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

.page-faq .faq-item summary:hover,
.page-faq .faq-item summary:focus-visible {
  border-left-color: var(--mint);
  background: rgba(52, 214, 165, .08);
}

.page-faq .faq-item[open] > summary {
  border-left-color: var(--orange);
  background: linear-gradient(90deg, rgba(255, 107, 26, .1), transparent 62%);
}

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  margin-top: 4px;
  border: 1px solid rgba(13, 44, 77, .35);
  border-radius: 50%;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--midnight);
}

.page-faq .faq-item__mark::before {
  width: 8px;
  height: 1.5px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__mark::after {
  width: 1.5px;
  height: 8px;
  transform: translate(-50%, -50%);
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}

.page-faq .faq-item[open] .faq-item__mark {
  border-color: var(--orange);
  background: rgba(255, 107, 26, .14);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__body {
  padding: 0 0 18px 18px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--faq-ink-soft);
}

.page-faq .faq-item__body p {
  margin: 0 0 12px;
}

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

.page-faq .faq-item__body a {
  color: var(--orange-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__body a:hover,
.page-faq .faq-item__body a:focus-visible {
  color: var(--wine);
}

.page-faq .faq-tip {
  margin-top: 12px;
  padding: 10px 14px;
  font-size: 14px;
  line-height: 1.65;
  color: #22505f;
  background: rgba(52, 214, 165, .13);
  border-left: 2px solid var(--mint);
}

/* ---------- 下载适配 ---------- */
.page-faq .faq-specs {
  padding: 54px 0 58px;
  background: linear-gradient(150deg, #12123a 0%, #0D2C4D 58%, #07182B 100%);
  position: relative;
}

.page-faq .faq-specs__grid {
  display: grid;
  gap: 32px;
}

.page-faq .faq-specs__text .eyebrow {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mint);
}

.page-faq .faq-specs__text h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.55rem, 5vw, 2.2rem);
  line-height: 1.18;
  letter-spacing: -.015em;
  margin: 0 0 14px;
  color: var(--mist);
}

.page-faq .faq-specs__lead {
  margin: 0;
  max-width: 36em;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--silver);
}

.page-faq .faq-specs__list {
  margin: 24px 0 0;
  padding: 0;
  display: grid;
}

.page-faq .faq-specs__list > div {
  padding: 14px 0;
  border-top: 1px solid rgba(195, 208, 220, .16);
}

.page-faq .faq-specs__list > div:last-child {
  border-bottom: 1px solid rgba(195, 208, 220, .16);
}

.page-faq .faq-specs__list dt {
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-faq .faq-specs__list dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--silver);
}

/* ---------- 联系 ---------- */
.page-faq .faq-contact {
  padding: 52px 0 66px;
  background: var(--space-blue);
  border-top: 1px solid var(--line);
}

.page-faq .faq-contact__inner {
  display: grid;
  gap: 30px;
}

.page-faq .faq-contact__text .eyebrow {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mint);
}

.page-faq .faq-contact__text h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.8vw, 2.1rem);
  line-height: 1.2;
  letter-spacing: -.015em;
  margin: 0 0 14px;
  color: var(--mist);
}

.page-faq .faq-contact__text p {
  margin: 0 0 22px;
  max-width: 36em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--silver);
}

.page-faq .faq-contact__list {
  margin: 0;
  padding: 22px;
  display: grid;
  gap: 16px;
  background: rgba(13, 44, 77, .55);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
}

.page-faq .faq-contact__list dt {
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--mint);
}

.page-faq .faq-contact__list dd {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--mist);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-start__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
    gap: 34px;
  }

  .page-faq .faq-specs__list > div {
    display: grid;
    grid-template-columns: 130px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

  .page-faq .faq-specs__list dt {
    margin-bottom: 0;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: calc(var(--header-h) + 44px) 0 66px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
    gap: 52px;
  }

  .page-faq .faq-board {
    padding: 24px 26px;
  }

  .page-faq .faq-start {
    padding: 72px 0 62px;
  }

  .page-faq .faq-specs {
    padding: 72px 0;
  }

  .page-faq .faq-specs__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: center;
    gap: 56px;
  }

  .page-faq .faq-contact {
    padding: 70px 0 82px;
  }

  .page-faq .faq-contact__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
    gap: 56px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-main {
    padding: 72px 0 80px;
  }

  .page-faq .faq-main__grid {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-faq .faq-side__list {
    display: block;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--faq-line-light);
  }

  .page-faq .faq-side__list li {
    margin-left: -1px;
  }

  .page-faq .faq-side__list a {
    display: flex;
    width: 100%;
    padding: 10px 0 10px 16px;
    white-space: normal;
    background: transparent;
    border: 0;
    border-left: 2px solid transparent;
  }

  .page-faq .faq-side__list a:hover,
  .page-faq .faq-side__list a:focus-visible {
    background: rgba(255, 107, 26, .07);
    border-left-color: var(--orange);
  }

  .page-faq .faq-item summary {
    font-size: 17px;
    padding: 17px 0 17px 18px;
  }

  .page-faq .faq-item__body {
    padding: 0 0 20px 21px;
    max-width: 46em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump__item,
  .page-faq .faq-side__list a,
  .page-faq .faq-item summary,
  .page-faq .faq-item__mark::after {
    transition: none;
  }
}