.page-faq {
  --faq-line: rgba(232, 241, 255, .12);
  --faq-line-soft: rgba(232, 241, 255, .07);
  --faq-cyan-soft: rgba(53, 224, 208, .12);
  --faq-gap: 40px;
  background:
    radial-gradient(120% 80% at 92% -10%, rgba(31, 122, 77, .20), transparent 58%),
    radial-gradient(90% 60% at 0% 6%, rgba(53, 224, 208, .08), transparent 60%),
    var(--ink);
  color: var(--white);
  font-family: var(--font-sans);
  padding-bottom: 88px;
  overflow-x: hidden;
}

.page-faq p {
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(232, 241, 255, .80);
  margin: 0 0 16px;
}

.page-faq p.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  line-height: 1.4;
  color: var(--cyan);
  text-transform: uppercase;
  margin: 0 0 14px;
  padding-left: 26px;
  position: relative;
}

.page-faq p.eyebrow::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 16px;
  height: 1px;
  background: var(--cyan);
  opacity: .7;
}

.page-faq h1 {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(31px, 7.2vw, 58px);
  line-height: 1.14;
  letter-spacing: -.035em;
  margin: 0 0 20px;
  color: var(--white);
}

.page-faq h2 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(23px, 4.6vw, 36px);
  line-height: 1.22;
  letter-spacing: -.02em;
  margin: 0 0 16px;
  color: var(--white);
}

.page-faq h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -.01em;
  margin: 0 0 10px;
  color: var(--white);
}

.page-faq a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 208, .35);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

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

.page-faq .numeric {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

/* ---------- 首屏 ---------- */
.page-faq .tut-hero {
  position: relative;
  padding: calc(var(--header-h) + 40px) 0 28px;
}

.page-faq .tut-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(232, 241, 255, .05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(232, 241, 255, .04) 1px, transparent 1px);
  background-size: 88px 88px;
  mask-image: radial-gradient(70% 60% at 20% 10%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(70% 60% at 20% 10%, #000 0%, transparent 78%);
  opacity: .5;
}

.page-faq .breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: 34px;
}

.page-faq .tut-hero__layout {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
}

.page-faq .tut-hero__lede {
  max-width: 60ch;
  font-size: 16px;
  color: rgba(232, 241, 255, .78);
}

.page-faq .tut-hero__aside {
  border-left: 1px solid var(--faq-line);
  padding-left: 18px;
}

.page-faq .tut-hero__mark {
  display: block;
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--amber);
  margin-bottom: 10px;
}

.page-faq .tut-hero__aside p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
  margin: 0;
  max-width: 34ch;
}

/* ---------- 章节跳转 + 进度条 ---------- */
.page-faq .tut-jump {
  position: relative;
  z-index: 1;
  margin-top: 40px;
  padding-top: 26px;
}

.page-faq .tut-jump__track {
  display: block;
  height: 2px;
  background: var(--faq-line-soft);
  position: relative;
  overflow: hidden;
}

.page-faq .tut-jump__fill {
  display: block;
  height: 100%;
  width: 17%;
  background: linear-gradient(90deg, var(--pitch), var(--cyan));
  box-shadow: 0 0 12px rgba(53, 224, 208, .5);
}

.page-faq .tut-jump__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 14px;
}

.page-faq .tut-jump__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 2px;
  border: 0;
  border-bottom: 1px solid var(--faq-line-soft);
  font-size: 13px;
  color: rgba(232, 241, 255, .72);
  letter-spacing: .02em;
}

.page-faq .tut-jump__link .numeric {
  font-size: 11px;
  color: var(--mist);
  letter-spacing: .12em;
}

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

/* ---------- 步骤区块骨架 ---------- */
.page-faq .tut-step {
  padding: 46px 0 6px;
  border-top: 1px solid var(--faq-line-soft);
  margin-top: 40px;
}

.page-faq .tut-step__grid {
  display: grid;
  gap: 12px;
}

.page-faq .tut-step__num {
  font-size: clamp(46px, 13vw, 92px);
  line-height: .82;
  font-weight: 700;
  color: rgba(53, 224, 208, .16);
  -webkit-text-stroke: 1px rgba(53, 224, 208, .45);
  text-stroke: 1px rgba(53, 224, 208, .45);
  letter-spacing: -.02em;
  user-select: none;
}

.page-faq .tut-step__body {
  min-width: 0;
}

/* ---------- 列表 ---------- */
.page-faq .tut-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .tut-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(232, 241, 255, .76);
}

.page-faq .tut-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 7px;
  height: 1px;
  background: var(--pitch);
}

.page-faq .tut-list strong {
  color: var(--white);
  font-weight: 700;
}

.page-faq .tut-list--tight li {
  font-size: 13.5px;
  color: var(--mist);
}

/* ---------- 有序步骤 ---------- */
.page-faq .tut-ordered {
  list-style: none;
  margin: 6px 0 20px;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .tut-ordered li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 15px 0;
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .tut-ordered__n {
  font-size: 15px;
  color: var(--amber);
  padding-top: 2px;
}

.page-faq .tut-ordered__t {
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(232, 241, 255, .78);
}

.page-faq .tut-ordered__t strong {
  color: var(--white);
}

.page-faq .tut-ordered--large li {
  grid-template-columns: 44px minmax(0, 1fr);
  padding: 18px 0;
}

.page-faq .tut-ordered--large .tut-ordered__n {
  font-size: 19px;
}

.page-faq .tut-note {
  border-left: 2px solid var(--pitch);
  padding: 2px 0 2px 14px;
  font-size: 13.5px;
  color: var(--mist);
  margin: 0;
}

/* ---------- 图片 ---------- */
.page-faq .tut-figure {
  margin: 22px 0 0;
  border: 1px solid var(--faq-line);
  background: var(--midnight);
  position: relative;
  overflow: hidden;
}

.page-faq .tut-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.9) contrast(1.05);
}

.page-faq .tut-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(160deg, rgba(7, 11, 20, 0) 40%, rgba(7, 11, 20, .72) 100%);
}

.page-faq .tut-figure figcaption {
  position: relative;
  z-index: 1;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--mist);
  border-top: 1px solid var(--faq-line-soft);
}

/* ---------- 设备切换 ---------- */
.page-faq .device-switch {
  margin-top: 8px;
}

.page-faq .device-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .device-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.page-faq .device-card {
  display: block;
  padding: 18px 8px 14px;
  border: 1px solid var(--faq-line);
  background: linear-gradient(180deg, rgba(20, 42, 74, .55), rgba(14, 24, 48, .55));
  text-align: center;
  cursor: pointer;
  transition: transform .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .device-card:hover {
  border-color: rgba(53, 224, 208, .45);
}

.page-faq .device-card__name {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-faq .device-shape {
  display: block;
  margin: 0 auto 12px;
  border: 1px solid rgba(232, 241, 255, .28);
  background: rgba(53, 224, 208, .06);
  position: relative;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .device-shape--phone {
  width: 26px;
  height: 44px;
  border-radius: 4px;
}

.page-faq .device-shape--tablet {
  width: 40px;
  height: 50px;
  border-radius: 3px;
}

.page-faq .device-shape--desktop {
  width: 56px;
  height: 34px;
  border-radius: 2px;
}

.page-faq .device-shape--desktop::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -8px;
  width: 22px;
  height: 1px;
  transform: translateX(-50%);
  background: rgba(232, 241, 255, .28);
}

.page-faq #dev-phone:checked ~ .device-cards label[for="dev-phone"],
.page-faq #dev-tablet:checked ~ .device-cards label[for="dev-tablet"],
.page-faq #dev-desktop:checked ~ .device-cards label[for="dev-desktop"] {
  border-color: var(--cyan);
  background: linear-gradient(180deg, rgba(53, 224, 208, .16), rgba(14, 24, 48, .7));
  transform: translateY(-3px);
  box-shadow: 0 14px 26px rgba(0, 0, 0, .45);
}

.page-faq #dev-phone:checked ~ .device-cards label[for="dev-phone"] .device-shape,
.page-faq #dev-tablet:checked ~ .device-cards label[for="dev-tablet"] .device-shape,
.page-faq #dev-desktop:checked ~ .device-cards label[for="dev-desktop"] .device-shape {
  border-color: var(--cyan);
  background: rgba(53, 224, 208, .16);
}

.page-faq #dev-phone:checked ~ .device-cards label[for="dev-phone"] .device-card__name,
.page-faq #dev-tablet:checked ~ .device-cards label[for="dev-tablet"] .device-card__name,
.page-faq #dev-desktop:checked ~ .device-cards label[for="dev-desktop"] .device-card__name {
  color: var(--white);
}

.page-faq #dev-phone:focus-visible ~ .device-cards label[for="dev-phone"],
.page-faq #dev-tablet:focus-visible ~ .device-cards label[for="dev-tablet"],
.page-faq #dev-desktop:focus-visible ~ .device-cards label[for="dev-desktop"] {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .device-panels {
  margin-top: 18px;
  border: 1px solid var(--faq-line);
  border-left: 2px solid var(--pitch);
  background: linear-gradient(150deg, rgba(20, 42, 74, .62), rgba(7, 11, 20, .5));
  padding: 20px 18px;
}

.page-faq .device-panel {
  display: none;
}

.page-faq .device-panel h3 {
  color: var(--white);
}

.page-faq .device-panel p {
  font-size: 14.5px;
  margin-bottom: 12px;
}

.page-faq #dev-phone:checked ~ .device-panels .device-panel--phone,
.page-faq #dev-tablet:checked ~ .device-panels .device-panel--tablet,
.page-faq #dev-desktop:checked ~ .device-panels .device-panel--desktop {
  display: block;
  animation: faq-panel-in .22s var(--ease) both;
}

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

.page-faq .tut-sync {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.85;
  color: var(--mist);
  border-top: 1px dashed var(--faq-line);
  padding-top: 14px;
}

/* ---------- FAQ ---------- */
.page-faq .faq-list {
  margin-top: 18px;
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .faq-item__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 2px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--white);
  cursor: pointer;
  list-style: none;
  transition: color .18s var(--ease);
}

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

.page-faq .faq-item__q::after {
  content: "";
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
  border-right: 1px solid var(--cyan);
  border-bottom: 1px solid var(--cyan);
  transform: rotate(45deg) translateY(-2px);
  transition: transform .2s var(--ease);
}

.page-faq .faq-item[open] .faq-item__q {
  color: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__q::after {
  transform: rotate(-135deg) translateY(-2px);
}

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

.page-faq .faq-item__a {
  padding: 0 2px 20px;
}

.page-faq .faq-item__a p {
  font-size: 14.5px;
  color: rgba(232, 241, 255, .74);
  margin: 0;
  max-width: 66ch;
}

/* ---------- 客服 ---------- */
.page-faq .tut-step--support {
  padding-bottom: 24px;
}

.page-faq .support-grid {
  display: grid;
  gap: 22px;
  margin-top: 20px;
}

.page-faq .support-card {
  border: 1px solid var(--faq-line);
  border-top: 2px solid var(--amber);
  background: linear-gradient(165deg, rgba(14, 24, 48, .9), rgba(7, 11, 20, .7));
  padding: 22px 18px;
}

.page-faq .support-list {
  margin: 0 0 16px;
}

.page-faq .support-row {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid var(--faq-line-soft);
}

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

.page-faq .support-row dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-faq .support-row dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--white);
  word-break: break-word;
}

.page-faq .support-row dd.numeric {
  font-size: 17px;
  color: var(--amber);
}

.page-faq .support-card__foot {
  font-size: 13px;
  color: var(--mist);
  margin: 0 0 18px;
}

.page-faq .support-card .btn {
  display: inline-block;
  border-bottom: 0;
}

.page-faq .tut-figure--support {
  margin: 0;
}

/* ---------- 平板 ---------- */
@media (min-width: 768px) {
  .page-faq {
    --faq-gap: 56px;
    padding-bottom: 112px;
  }

  .page-faq .tut-hero {
    padding: calc(var(--header-h) + 58px) 0 34px;
  }

  .page-faq .tut-hero__layout {
    grid-template-columns: minmax(0, 1fr) 250px;
    align-items: end;
    gap: 40px;
  }

  .page-faq .tut-jump__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px 22px;
  }

  .page-faq .tut-step {
    padding-top: 60px;
    margin-top: 52px;
  }

  .page-faq .tut-step__grid {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 28px;
  }

  .page-faq .tut-step__num {
    font-size: 74px;
    padding-top: 4px;
  }

  .page-faq .tut-step__grid--split {
    grid-template-columns: 92px minmax(0, 1fr);
  }

  .page-faq .tut-step__grid--split .tut-figure {
    grid-column: 2 / -1;
    margin-top: 26px;
  }

  .page-faq .device-panels {
    padding: 24px 22px;
    min-height: 178px;
  }

  .page-faq .support-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .9fr);
    align-items: start;
    gap: 26px;
  }

  .page-faq .support-row {
    grid-template-columns: 96px minmax(0, 1fr);
    align-items: baseline;
    gap: 12px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1080px) {
  .page-faq .tut-hero__layout {
    grid-template-columns: minmax(0, 1fr) 300px;
  }

  .page-faq .tut-jump__list {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-faq .tut-jump__link {
    flex-direction: column;
    gap: 4px;
    padding-bottom: 12px;
  }

  .page-faq .tut-step__grid,
  .page-faq .tut-step__grid--split {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 44px;
  }

  .page-faq .tut-step__num {
    font-size: 96px;
  }

  .page-faq .tut-step__grid--split {
    grid-template-columns: 120px minmax(0, 1fr) minmax(0, 520px);
    align-items: start;
  }

  .page-faq .tut-step__grid--split .tut-figure {
    grid-column: auto;
    margin-top: 0;
  }

  .page-faq .device-cards {
    gap: 14px;
  }

  .page-faq .support-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 440px);
    gap: 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}