.page-faq {
  --faq-gap: clamp(22px, 3.6vw, 36px);
  --faq-card-pad: clamp(18px, 2.6vw, 26px);
  --faq-accent: var(--c-signal);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-bottom: clamp(36px, 5.5vw, 64px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -18%;
  right: -14%;
  width: min(720px, 92vw);
  height: min(720px, 92vw);
  border-radius: 50%;
  background: radial-gradient(circle at 58% 42%, rgba(255, 122, 26, .16), transparent 62%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  left: -22%;
  bottom: -46%;
  width: min(600px, 88vw);
  height: min(600px, 88vw);
  border-radius: 50%;
  background: radial-gradient(circle at 42% 48%, rgba(74, 109, 140, .3), transparent 66%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
}

.page-faq .faq-hero .crumbs {
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-faq .faq-hero__title {
  margin: .6rem 0 0;
  max-width: 24ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5.6vw, 50px);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--c-title);
}

.page-faq .faq-hero__lede {
  margin: clamp(16px, 2.2vw, 22px) 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--c-body);
}

.page-faq .faq-jump {
  margin-top: clamp(20px, 3vw, 30px);
}

.page-faq .faq-jump .chip {
  text-decoration: none;
  transition: border-color var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease);
}

.page-faq .faq-jump .chip:hover {
  border-color: var(--c-signal);
  color: var(--c-signal);
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: clamp(26px, 3.6vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-faq .faq-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px clamp(14px, 2vw, 22px);
  background: linear-gradient(180deg, rgba(18, 41, 63, .92), rgba(11, 31, 51, .92));
}

.page-faq .faq-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.1;
  color: var(--c-signal);
}

.page-faq .faq-fact__label {
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--c-meta);
}

/* ---------- 按设备 ---------- */
.page-faq .faq-device {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(26px, 3.6vw, 42px);
}

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

.page-faq .faq-device__groups {
  display: grid;
  gap: clamp(16px, 2.2vw, 22px);
}

.page-faq .faq-group {
  padding: var(--faq-card-pad);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(18, 41, 63, .78), rgba(11, 31, 51, .78));
  transition: border-color var(--t-mid) var(--ease);
}

.page-faq .faq-group:hover {
  border-color: rgba(255, 122, 26, .45);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--c-line);
}

.page-faq .faq-group__code {
  padding: 3px 9px;
  border: 1px solid rgba(255, 122, 26, .42);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--faq-accent);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--c-title);
}

.page-faq .faq-group__meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .05em;
  color: var(--c-meta);
}

.page-faq .faq-list {
  display: grid;
  gap: 10px;
  padding-top: 14px;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: rgba(5, 8, 13, .34);
  overflow: hidden;
  transition: border-color var(--t-mid) var(--ease), background var(--t-mid) var(--ease);
}

.page-faq .faq-item:hover,
.page-faq .faq-item[open] {
  border-color: rgba(255, 122, 26, .55);
}

.page-faq .faq-item[open] {
  background: rgba(5, 8, 13, .62);
}

.page-faq .faq-item__q {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 13px 16px;
  font-size: clamp(14.5px, 1.5vw, 15.5px);
  font-weight: 500;
  line-height: 1.55;
  color: var(--c-paper);
  transition: color var(--t-fast) var(--ease);
}

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

.page-faq .faq-item__q::before {
  content: "+";
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 1px;
  display: grid;
  place-items: center;
  border: 1px solid var(--c-line-strong);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
  color: var(--c-meta);
  transition: border-color var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease);
}

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

.page-faq .faq-item[open] .faq-item__q::before {
  content: "–";
  border-color: var(--c-signal);
  background: var(--c-signal);
  color: #05080D;
}

.page-faq .faq-item__a {
  padding: 0 16px 16px 48px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-body);
  animation: faq-fade var(--t-slow) var(--ease) both;
}

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

@keyframes faq-fade {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: none; }
}

.page-faq .faq-item__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--c-line-strong);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .03em;
  color: var(--c-signal-soft);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-faq .faq-item__link::after {
  content: "→";
}

.page-faq .faq-item__link:hover {
  color: var(--c-signal);
  border-color: var(--c-signal);
}

/* ---------- 按场景 ---------- */
.page-faq .faq-scenes {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(26px, 3.6vw, 42px);
}

.page-faq .faq-scene {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: var(--faq-card-pad);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, rgba(18, 41, 63, .88), rgba(11, 31, 51, .72));
  transition: border-color var(--t-mid) var(--ease), transform var(--t-mid) var(--ease);
}

.page-faq .faq-scene:hover {
  border-color: rgba(255, 122, 26, .5);
  transform: translateY(-3px);
}

.page-faq .faq-scene__no {
  align-self: flex-start;
  padding: 3px 9px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--c-meta);
}

.page-faq .faq-scene__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 19px);
  letter-spacing: -.01em;
  color: var(--c-title);
}

.page-faq .faq-scene p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-body);
}

.page-faq .faq-scene .faq-item__link {
  align-self: flex-start;
  margin-top: auto;
}

/* ---------- 查记录 ---------- */
.page-faq .faq-record {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(26px, 3.6vw, 42px);
}

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

.page-faq .faq-step {
  display: flex;
  gap: 16px;
  padding: clamp(16px, 2.2vw, 22px) 0;
  border-top: 1px solid var(--c-line);
}

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

.page-faq .faq-step__no {
  flex: 0 0 auto;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--faq-accent);
}

.page-faq .faq-step__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 16.5px;
  letter-spacing: -.01em;
  color: var(--c-title);
}

.page-faq .faq-step__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-body);
}

.page-faq .faq-record__aside {
  padding: var(--faq-card-pad);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(18, 41, 63, .92), rgba(5, 8, 13, .82));
}

.page-faq .faq-aside__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: -.01em;
  color: var(--c-title);
}

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

.page-faq .faq-aside__list li {
  display: flex;
  gap: 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-body);
}

.page-faq .faq-aside__list li::before {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  margin-top: .62em;
  border-radius: 50%;
  background: var(--c-signal);
}

/* ---------- 提交之后 ---------- */
.page-faq .faq-flow-figure {
  margin: clamp(24px, 3.4vw, 36px) 0 0;
}

.page-faq .faq-flow {
  list-style: none;
  margin: clamp(24px, 3.4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 2.8vw, 28px);
}

.page-faq .faq-flow__node {
  position: relative;
  padding-top: 26px;
  border-top: 2px solid var(--c-line);
}

.page-faq .faq-flow__node::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 0;
  width: 12px;
  height: 12px;
  box-sizing: border-box;
  border: 2px solid var(--c-signal);
  border-radius: 50%;
  background: var(--c-deep);
}

.page-faq .faq-flow__node:nth-child(2)::before { border-color: var(--c-green); }
.page-faq .faq-flow__node:nth-child(3)::before { border-color: var(--c-amber); }
.page-faq .faq-flow__node:nth-child(4)::before { border-color: var(--c-mist); }

.page-faq .faq-flow__step {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--c-meta);
}

.page-faq .faq-flow__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: -.01em;
  color: var(--c-title);
}

.page-faq .faq-flow__node p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--c-body);
}

.page-faq .faq-submit__cta {
  margin-top: clamp(24px, 3.4vw, 36px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 找人帮忙 ---------- */
.page-faq .faq-help {
  display: grid;
  gap: clamp(22px, 3vw, 32px);
  margin-top: clamp(26px, 3.6vw, 42px);
  padding: clamp(22px, 3.2vw, 34px);
  border: 1px solid var(--c-line);
  border-radius: var(--r-xl);
  background: linear-gradient(150deg, rgba(18, 41, 63, .95), rgba(5, 8, 13, .88));
}

.page-faq .faq-help__intro p {
  margin: clamp(12px, 1.8vw, 16px) 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-body);
}

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

.page-faq .faq-help__item {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--c-line);
}

.page-faq .faq-help__item:first-child {
  padding-top: 0;
}

.page-faq .faq-help__k {
  min-width: 76px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-meta);
}

.page-faq .faq-help__v {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--c-paper);
  word-break: break-all;
}

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

.page-faq .faq-help__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-meta);
}

.page-faq .faq-help__note a {
  color: var(--c-signal-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-help__note a:hover {
  color: var(--c-signal);
}

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

@media (min-width: 800px) {
  .page-faq .faq-scenes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-faq .faq-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: clamp(16px, 2.2vw, 26px);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-help__intro { grid-column: 1; }
  .page-faq .faq-help__list  { grid-column: 2; }

  .page-faq .faq-help__actions,
  .page-faq .faq-help__note {
    grid-column: 1 / -1;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-record {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-device {
    grid-template-columns: minmax(0, .86fr) minmax(0, 1.14fr);
    align-items: start;
  }

  .page-faq .faq-device__figure {
    position: sticky;
    top: 96px;
  }
}

@media (max-width: 480px) {
  .page-faq .faq-item__a {
    padding-left: 16px;
  }

  .page-faq .faq-group__meta {
    margin-left: 0;
  }
}

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

  .page-faq .faq-scene:hover {
    transform: none;
  }
}
<<<END>>>