.page-faq {
  --faq-rail: 116px;
  --faq-stage-gap: clamp(40px, 5vw, 68px);
  --faq-figure-line: var(--line);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(22px, 4vw, 48px) 0 0;
  border-bottom: 1px solid var(--line);
  background-image:
    radial-gradient(110% 80% at 88% 0%, rgba(61, 242, 168, 0.10), transparent 62%),
    repeating-linear-gradient(102deg, rgba(28, 68, 56, 0.34) 0 1px, transparent 1px 26px);
  background-repeat: no-repeat, repeat;
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  padding-bottom: clamp(26px, 4vw, 44px);
}

.page-faq .faq-hero__copy .crumbs {
  margin-bottom: 18px;
}

.page-faq .faq-hero__copy .eyebrow {
  margin-bottom: 14px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: condensed;
  font-size: clamp(28px, 4.4vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
  max-width: 20ch;
}

.page-faq .faq-hero .lede {
  margin-top: 18px;
  max-width: 38em;
  color: var(--muted);
  line-height: 1.75;
}

.page-faq .faq-hero .lede a {
  color: var(--mint-soft);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 24px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  line-height: 1.6;
  color: var(--faint);
}

.page-faq .faq-hero__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding-left: 12px;
  border-left: 1px solid var(--line);
}

.page-faq .faq-hero__facts .num {
  color: var(--mint-soft);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
}

.page-faq .faq-hero__figure {
  margin: 0;
  padding: 1px;
  background: var(--line);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  align-self: end;
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  filter: saturate(0.7) contrast(1.05);
}

.page-faq .faq-hero__figure figcaption {
  padding: 10px 12px 12px;
  background: var(--panel);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--faint);
}

/* 阶段跳转 */
.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: clamp(20px, 3vw, 32px);
}

.page-faq .faq-jump__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  transition: color 120ms ease, border-color 120ms ease, background-color 120ms ease, transform 120ms ease;
}

.page-faq .faq-jump__item .num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--faint);
  letter-spacing: 0.04em;
}

.page-faq .faq-jump__item:hover,
.page-faq .faq-jump__item:focus-visible {
  color: var(--mint);
  border-color: var(--mint);
  background: rgba(61, 242, 168, 0.07);
  transform: translateY(-2px);
  outline: none;
}

.page-faq .faq-jump__item:hover .num,
.page-faq .faq-jump__item:focus-visible .num {
  color: var(--mint);
}

/* 问答主体 */
.page-faq .faq-stages {
  padding: clamp(32px, 5vw, 72px) 0 clamp(40px, 6vw, 88px);
}

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

.page-faq .faq-stage:not(:first-child) {
  margin-top: var(--faq-stage-gap);
  padding-top: var(--faq-stage-gap);
}

.page-faq .faq-stage:not(:first-child)::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 12px;
  background: repeating-linear-gradient(102deg, var(--line) 0 1px, transparent 1px 13px);
  opacity: 0.75;
}

.page-faq .faq-stage__rail {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
}

.page-faq .faq-stage__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.2vw, 38px);
  line-height: 1;
  color: var(--mint);
  letter-spacing: -0.02em;
}

.page-faq .faq-stage__goal {
  flex: 1 1 auto;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  max-width: 30ch;
  margin: 0;
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

.page-faq .faq-stage__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text);
  margin: 0 0 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

/* 折叠问答 */
.page-faq .qa {
  position: relative;
  background: var(--panel);
  box-shadow: inset 0 0 0 1px var(--line);
  transition: background-color 120ms ease, box-shadow 120ms ease;
}

.page-faq .qa + .qa {
  margin-top: 10px;
}

.page-faq .qa::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--line);
  transition: background-color 120ms ease;
}

.page-faq .qa[open] {
  background: var(--panel-2);
  box-shadow: inset 0 0 0 1px rgba(61, 242, 168, 0.38);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-faq .qa[open]::before {
  background: var(--mint);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  line-height: 1.55;
  color: var(--text);
  transition: color 120ms ease;
}

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

.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible {
  color: var(--mint-soft);
  outline: none;
}

.page-faq .qa__mark {
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1.2;
  color: var(--faint);
  transition: transform 120ms ease, color 120ms ease;
}

.page-faq .qa[open] .qa__mark {
  transform: rotate(45deg);
  color: var(--mint);
}

.page-faq .qa__a {
  padding: 0 16px 16px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .qa__a p {
  margin: 0;
  max-width: 40em;
}

.page-faq .qa__a p + p,
.page-faq .qa__a ol + p {
  margin-top: 10px;
}

.page-faq .qa__a a {
  color: var(--mint-soft);
  text-decoration: underline;
  text-decoration-color: rgba(157, 247, 210, 0.4);
  text-underline-offset: 3px;
  transition: color 120ms ease, text-decoration-color 120ms ease;
}

.page-faq .qa__a a:hover,
.page-faq .qa__a a:focus-visible {
  color: var(--mint);
  text-decoration-color: var(--mint);
}

.page-faq .qa__steps {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: qa-step;
  display: grid;
  gap: 8px;
}

.page-faq .qa__steps li {
  position: relative;
  padding-left: 28px;
  counter-increment: qa-step;
}

.page-faq .qa__steps li::before {
  content: counter(qa-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--warm);
}

.page-faq .qa__meta {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--faint);
  padding-left: 10px;
  border-left: 2px solid var(--line);
}

/* 组内配图 */
.page-faq .faq-figure {
  margin: 22px 0 0;
  padding: 1px;
  background: var(--faq-figure-line);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.75) contrast(1.02);
}

.page-faq .faq-figure figcaption {
  padding: 10px 12px;
  background: var(--panel);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--faint);
}

/* 联系块 */
.page-faq .faq-contact {
  display: grid;
  gap: 20px;
  padding: 20px;
  background: var(--panel);
  box-shadow: inset 3px 0 0 0 var(--warm), inset 0 0 0 1px var(--line);
}

.page-faq .faq-contact__body p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-contact__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-faq .faq-contact__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
}

.page-faq .faq-contact__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 1px;
  background: var(--warm);
}

.page-faq .faq-contact__side {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-contact__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
}

.page-faq .faq-contact__value {
  margin: 4px 0 14px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--mint-soft);
  word-break: break-word;
}

.page-faq .faq-contact__note {
  margin: 0 0 16px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-faq .faq-contact__side .btn {
  display: inline-block;
}

.page-faq .faq-links {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--faint);
}

.page-faq .faq-links a {
  color: var(--muted);
  text-decoration: underline;
  text-decoration-color: rgba(143, 169, 160, 0.45);
  text-underline-offset: 3px;
  transition: color 120ms ease;
}

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

/* 桌面布局 */
@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    align-items: end;
  }

  .page-faq .faq-stage {
    display: grid;
    grid-template-columns: minmax(0, var(--faq-rail)) minmax(0, 1fr);
    gap: clamp(24px, 3.4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-stage__rail {
    display: block;
    margin-bottom: 0;
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-stage__num {
    display: block;
  }

  .page-faq .faq-stage__rail::after {
    content: "";
    display: block;
    width: 1px;
    height: 64px;
    margin: 16px 0 18px;
    background: linear-gradient(180deg, var(--line), transparent);
  }

  .page-faq .faq-stage__goal {
    padding-left: 0;
    border-left: 0;
    max-width: 22ch;
  }

  .page-faq .faq-stage__title {
    margin-top: 2px;
  }

  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    gap: clamp(20px, 3vw, 40px);
    padding: 24px;
  }

  .page-faq .faq-contact__side {
    padding-top: 0;
    padding-left: clamp(18px, 2.4vw, 28px);
    border-top: 0;
    border-left: 1px solid var(--line);
  }
}

@media (min-width: 1200px) {
  .page-faq {
    --faq-rail: 132px;
  }

  .page-faq .faq-hero h1 {
    max-width: 18ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa::before,
  .page-faq .qa__mark,
  .page-faq .qa__q,
  .page-faq .faq-jump__item {
    transition: none;
  }
}
<<<END>>>