.page-faq {
  --faq-cut: var(--sf-cut);
  --faq-hair: rgba(38, 49, 60, 0.75);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--sf-header-h) + 52px) 0 56px;
  background:
    radial-gradient(120% 88% at 84% 6%, rgba(198, 255, 61, 0.13), transparent 58%),
    radial-gradient(95% 82% at 4% 98%, rgba(111, 216, 255, 0.11), transparent 62%),
    var(--sf-ink);
  border-bottom: 1px solid var(--sf-hair);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(38, 49, 60, 0.42) 1px, transparent 1px),
    linear-gradient(90deg, rgba(38, 49, 60, 0.42) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.8), transparent 76%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.8), transparent 76%);
  pointer-events: none;
}

.page-faq .faq-hero__glow {
  position: absolute;
  top: -34%;
  right: -14%;
  width: 56%;
  height: 168%;
  background: linear-gradient(152deg, rgba(198, 255, 61, 0.18), rgba(255, 122, 47, 0.1) 48%, transparent 74%);
  transform: rotate(-12deg);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--sf-font-display);
  font-size: clamp(34px, 6.4vw, 62px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--sf-white);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--sf-text);
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--sf-line);
  border: 1px solid var(--sf-line);
}

.page-faq .faq-fact {
  display: grid;
  gap: 6px;
  align-content: start;
  padding: 16px 12px;
  background: var(--sf-panel);
}

.page-faq .faq-fact__num {
  font-family: var(--sf-font-mono);
  font-size: clamp(20px, 4.6vw, 28px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--sf-neon);
}

.page-faq .faq-fact__unit {
  margin-left: 2px;
  font-size: 13px;
  color: var(--sf-neon);
}

.page-faq .faq-fact__label {
  font-size: 12px;
  line-height: 1.45;
  letter-spacing: 0.04em;
  color: var(--sf-mist);
}

/* ---------- 九步索引 ---------- */
.page-faq .faq-steps {
  padding: clamp(22px, 3.4vw, 36px) clamp(18px, 3vw, 32px);
  overflow: hidden;
}

.page-faq .faq-steps__head .sf-h2 {
  margin: 10px 0 10px;
  font-size: clamp(23px, 3.6vw, 34px);
  line-height: 1.24;
  color: var(--sf-white);
}

.page-faq .faq-steps__head .sf-prose {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.72;
}

.page-faq .faq-figure {
  margin: 24px 0 0;
  overflow: hidden;
  border: 1px solid var(--sf-line);
  background: var(--sf-panel);
  -webkit-clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
}

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

.page-faq .faq-figure--compare {
  margin: 0 0 26px;
}

.page-faq .faq-steps__list {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 172px;
  gap: 12px;
  margin: 24px calc(clamp(18px, 3vw, 32px) * -1) 0;
  padding: 4px clamp(18px, 3vw, 32px) 8px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-step {
  display: grid;
  gap: 10px;
  min-height: 94px;
  padding: 14px 15px;
  background: rgba(10, 13, 18, 0.72);
  border: 1px solid var(--sf-line);
  border-top: 2px solid var(--sf-line);
  text-decoration: none;
  color: var(--sf-text);
  scroll-snap-align: start;
  transition: border-color 0.2s var(--sf-ease), transform 0.2s var(--sf-ease), background 0.2s var(--sf-ease);
}

.page-faq .faq-step:hover,
.page-faq .faq-step:focus-visible {
  border-color: var(--sf-neon);
  background: rgba(198, 255, 61, 0.07);
  transform: translateY(-3px);
}

.page-faq .faq-step__no {
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--sf-ice);
}

.page-faq .faq-step__txt {
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--sf-white);
}

.page-faq .faq-step--key {
  border-top-color: var(--sf-orange);
  background: linear-gradient(180deg, rgba(255, 122, 47, 0.16), rgba(10, 13, 18, 0.72) 72%);
}

.page-faq .faq-step--key .faq-step__no {
  color: var(--sf-orange);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-block.sf-section {
  padding-block: clamp(52px, 7vw, 84px);
}

.page-faq .faq-block__grid {
  display: grid;
  gap: 22px;
}

.page-faq .faq-block__aside {
  position: relative;
  padding-left: 18px;
}

.page-faq .faq-block__aside::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.4em;
  bottom: 0.4em;
  width: 3px;
  background: var(--sf-neon);
}

.page-faq .faq-block__no {
  display: block;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--sf-ice);
}

.page-faq .faq-block__title {
  margin: 10px 0 0;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.24;
  color: var(--sf-white);
}

.page-faq .faq-block__note {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--sf-mist);
}

.page-faq .faq-block--review {
  background: linear-gradient(180deg, rgba(18, 50, 64, 0.62), rgba(10, 13, 18, 0) 62%), var(--sf-ink);
}

.page-faq .faq-block--watch {
  background: linear-gradient(180deg, rgba(42, 26, 16, 0.78), rgba(10, 13, 18, 0) 62%), var(--sf-ink);
}

.page-faq .faq-block--watch .faq-block__aside::before {
  background: var(--sf-orange);
}

.page-faq .faq-block--watch .faq-block__no {
  color: var(--sf-orange);
}

.page-faq .faq-list {
  border-top: 1px solid var(--sf-line);
}

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

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  padding: 18px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--sf-white);
  transition: color 0.2s var(--sf-ease), background 0.2s var(--sf-ease);
}

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

.page-faq .faq-item > summary::after {
  content: "";
  width: 9px;
  height: 9px;
  flex: none;
  border-right: 2px solid var(--sf-neon);
  border-bottom: 2px solid var(--sf-neon);
  transform: rotate(45deg);
  transition: transform 0.25s var(--sf-ease);
}

.page-faq .faq-item[open] > summary::after {
  transform: rotate(225deg);
}

.page-faq .faq-item > summary:hover,
.page-faq .faq-item > summary:focus-visible {
  color: var(--sf-neon);
  background: rgba(20, 26, 34, 0.6);
}

.page-faq .faq-item__body {
  padding: 14px 16px 20px;
  background: rgba(20, 26, 34, 0.62);
  border-left: 2px solid var(--faq-hair);
  animation: faqAnswerIn 0.3s var(--sf-ease);
}

.page-faq .faq-item__body p {
  margin: 0;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--sf-text);
}

.page-faq .faq-item__body a {
  color: var(--sf-ice);
  text-decoration: none;
  border-bottom: 1px solid rgba(111, 216, 255, 0.45);
}

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

@keyframes faqAnswerIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 三维度示意 ---------- */
.page-faq .faq-dims {
  margin-top: 26px;
  padding: 20px 18px 22px;
  background: var(--sf-ice-deep);
  border: 1px solid rgba(111, 216, 255, 0.3);
  -webkit-clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
}

.page-faq .faq-dims__cap {
  margin: 0 0 14px;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--sf-ice);
}

.page-faq .faq-dims__list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-dims__item {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 13px 14px;
  background: rgba(10, 13, 18, 0.5);
  border: 1px solid rgba(111, 216, 255, 0.22);
}

.page-faq .faq-dims__key {
  font-family: var(--sf-font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--sf-ice);
}

.page-faq .faq-dims__val {
  font-size: 14px;
  line-height: 1.62;
  color: var(--sf-text);
}

/* ---------- 排查与联络 ---------- */
.page-faq .faq-help {
  padding: clamp(20px, 3vw, 32px);
}

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

.page-faq .faq-check li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 12px 14px;
  background: rgba(10, 13, 18, 0.55);
  border-left: 2px solid var(--sf-line);
  transition: border-color 0.2s var(--sf-ease), background 0.2s var(--sf-ease);
}

.page-faq .faq-check li:hover {
  border-left-color: var(--sf-orange);
  background: rgba(42, 26, 16, 0.55);
}

.page-faq .faq-check__no {
  font-family: var(--sf-font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--sf-orange);
}

.page-faq .faq-check__text {
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--sf-text);
}

.page-faq .faq-help__text {
  margin: 22px 0 0;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--sf-text);
}

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

/* ---------- 桌面端 ---------- */
@media (min-width: 940px) {
  .page-faq .faq-hero {
    padding: calc(var(--sf-header-h) + 76px) 0 76px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 56px;
    align-items: end;
  }

  .page-faq .faq-fact {
    padding: 20px 16px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-block__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 56px;
    align-items: start;
  }

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

  .page-faq .faq-steps__list {
    grid-auto-columns: minmax(150px, 1fr);
  }
}

@media (min-width: 820px) {
  .page-faq .faq-dims__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }

  .page-faq .faq-dims__item::after {
    content: "";
    position: absolute;
    top: 50%;
    right: -19px;
    width: 9px;
    height: 9px;
    border-top: 2px solid rgba(111, 216, 255, 0.55);
    border-right: 2px solid rgba(111, 216, 255, 0.55);
    transform: translateY(-50%) rotate(45deg);
  }

  .page-faq .faq-dims__item:last-child::after {
    content: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__body {
    animation: none;
  }

  .page-faq .faq-step,
  .page-faq .faq-item > summary,
  .page-faq .faq-item > summary::after,
  .page-faq .faq-check li {
    transition: none;
  }

  .page-faq .faq-step:hover,
  .page-faq .faq-step:focus-visible {
    transform: none;
  }
}
<<<END>>>

.page-faq {
  --sf-hair: var(--sf-ink);
}