.page-faq {
  --faq-rail-w: 208px;
  --faq-gap: clamp(1.8rem, 4vw, 3.2rem);
  --faq-ink-soft: rgba(246, 241, 231, .82);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(1.6rem, 4vw, 2.8rem);
}

.page-faq .crumbs {
  margin-bottom: clamp(1.2rem, 3vw, 2rem);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--faq-gap);
  align-items: center;
}

.page-faq .faq-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 3.9rem);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--cream);
  margin: .55rem 0 1rem;
  max-width: 18ch;
}

.page-faq .faq-lede {
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  line-height: 1.8;
  color: var(--cream);
  opacity: .84;
  max-width: 48ch;
  margin: 0;
}

.page-faq .faq-hero__actions {
  margin-top: 1.5rem;
}

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

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

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  }
}

/* ---------- 三张诊断卡 ---------- */
.page-faq .faq-cards {
  list-style: none;
  margin: var(--faq-gap) 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-faq .faq-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .6rem;
  padding: 1.5rem 1.35rem;
  border-radius: var(--radius-m);
  border: 1px solid var(--line-soft);
  transition: border-color .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease);
}

.page-faq .faq-card:hover,
.page-faq .faq-card:focus-within {
  border-color: var(--line-cyan);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.page-faq .faq-card__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.2rem, 2.4vw, 1.5rem);
  line-height: 1.25;
  color: var(--cream);
  margin: .2rem 0 0;
}

.page-faq .faq-card__text {
  margin: 0;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--ink);
  color: var(--faq-ink-soft);
}

.page-faq .faq-card__link {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-weight: 700;
  font-size: .9rem;
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .faq-card__link::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
}

.page-faq .faq-card__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

@media (min-width: 760px) {
  .page-faq .faq-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: var(--faq-gap);
}

@media (min-width: 940px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    align-items: start;
  }
}

.page-faq .faq-rail__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: .8rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mist);
  margin: 0 0 .7rem;
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 .5rem;
  display: flex;
  gap: .5rem;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-rail__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-rail__list a {
  display: block;
  white-space: nowrap;
  padding: .5rem .8rem;
  border-radius: 999px;
  border: 1px solid var(--line-soft);
  font-size: .85rem;
  color: var(--mist);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--cyan);
  border-color: var(--line-cyan);
  background: var(--glass);
}

@media (min-width: 940px) {
  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    overflow: visible;
    gap: .35rem;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__list a {
    border: 0;
    border-left: 2px solid var(--line-soft);
    border-radius: 0;
    padding: .55rem 0 .55rem .9rem;
  }

  .page-faq .faq-rail__list a:hover,
  .page-faq .faq-rail__list a:focus-visible {
    background: transparent;
    border-left-color: var(--cyan);
  }
}

/* ---------- 章节 ---------- */
.page-faq .faq-flow {
  display: grid;
  gap: var(--faq-gap);
  min-width: 0;
}

.page-faq .faq-step {
  scroll-margin-top: 96px;
  min-width: 0;
}

.page-faq .faq-step + .faq-step {
  border-top: 1px solid var(--line-soft);
  padding-top: var(--faq-gap);
}

.page-faq .faq-step h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.8vw, 2.3rem);
  line-height: 1.22;
  letter-spacing: -.01em;
  color: var(--cream);
  margin: .5rem 0 .8rem;
}

.page-faq .faq-step__intro {
  margin: 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--cream);
  opacity: .82;
  max-width: 62ch;
}

.page-faq .faq-step__intro a,
.page-faq .faq-qa a,
.page-faq .faq-foot-note a {
  color: var(--cyan);
  text-underline-offset: 3px;
}

/* ---------- 步骤清单 ---------- */
.page-faq .faq-checklist {
  counter-reset: faqstep;
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: .9rem;
}

.page-faq .faq-checklist li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 3rem;
  line-height: 1.78;
  font-size: .98rem;
  color: var(--cream);
  opacity: .86;
}

.page-faq .faq-checklist li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: .18rem;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: .85rem;
  letter-spacing: .06em;
  color: var(--cyan);
  border-left: 2px solid var(--cyan);
  padding-left: .5rem;
  line-height: 1.5;
}

.page-faq .faq-checklist a {
  color: var(--cyan);
  text-underline-offset: 3px;
}

/* ---------- 面板 ---------- */
.page-faq .faq-note {
  margin-top: 1.8rem;
  padding: 1.4rem 1.4rem 1.3rem;
  border-radius: var(--radius-m);
  color: var(--ink);
}

.page-faq .faq-note__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1rem;
  margin: 0 0 .7rem;
  color: var(--ink);
}

.page-faq .faq-note ul {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: .45rem;
  font-size: .94rem;
  line-height: 1.7;
}

.page-faq .faq-note__text {
  margin: 0;
  font-size: .94rem;
  line-height: 1.75;
}

.page-faq .faq-note--alert {
  border-left: 4px solid var(--coral);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-qa {
  margin-top: 1.9rem;
  border-top: 1px solid var(--line-soft);
}

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

.page-faq .faq-qa summary {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  list-style: none;
  cursor: pointer;
  padding: 1.05rem .2rem;
  font-weight: 600;
  font-size: .98rem;
  line-height: 1.65;
  color: var(--cream);
  transition: color .2s var(--ease);
}

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

.page-faq .faq-qa summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.15rem;
  line-height: 1.2;
  color: var(--cyan);
}

.page-faq .faq-qa details[open] summary::after {
  content: "–";
}

.page-faq .faq-qa summary:hover,
.page-faq .faq-qa summary:focus-visible {
  color: var(--cyan);
}

.page-faq .faq-qa details p {
  margin: 0 0 1.15rem;
  padding-right: 1.6rem;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--cream);
  opacity: .78;
  max-width: 64ch;
}

/* ---------- 复制清单 ---------- */
.page-faq .faq-copy-row {
  margin-top: 1.6rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .8rem 1.2rem;
}

.page-faq .faq-copy__tag {
  color: var(--cyan);
  font-size: .8rem;
  margin-left: .35rem;
}

.page-faq .faq-copy__hint {
  margin: 0;
  font-size: .85rem;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 路径对比 ---------- */
.page-faq .faq-compare {
  display: grid;
  gap: 1rem;
  margin-top: 1.6rem;
}

.page-faq .faq-compare__col {
  display: grid;
  gap: .5rem;
  align-content: start;
  padding: 1.35rem;
  border-radius: var(--radius-m);
  border: 1px solid var(--line-soft);
}

.page-faq .faq-compare__col--old {
  background: var(--glass);
}

.page-faq .faq-compare__col--new {
  background: rgba(0, 229, 199, .09);
  border-color: var(--line-cyan);
}

.page-faq .faq-compare__num {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 5.4vw, 2.9rem);
  line-height: 1;
  margin: .3rem 0 .2rem;
}

.page-faq .faq-compare__col--old .faq-compare__num {
  color: var(--mist);
}

.page-faq .faq-compare__col--new .faq-compare__num {
  color: var(--cyan);
}

.page-faq .faq-compare__text {
  margin: 0;
  font-size: .94rem;
  line-height: 1.75;
  color: var(--cream);
  opacity: .8;
}

.page-faq .faq-compare__col .tag {
  justify-self: start;
}

@media (min-width: 700px) {
  .page-faq .faq-compare {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 设备卡 ---------- */
.page-faq .faq-devices {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: .9rem;
}

.page-faq .faq-device {
  display: grid;
  gap: .4rem;
  padding: 1.15rem 1.2rem;
  border-radius: var(--radius-m);
  border: 1px solid var(--line-soft);
  background: var(--glass);
}

.page-faq .faq-device__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1rem;
  color: var(--cyan);
}

.page-faq .faq-device p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.7;
  color: var(--cream);
  opacity: .78;
}

@media (min-width: 700px) {
  .page-faq .faq-devices {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 支持区 ---------- */
.page-faq .faq-support {
  display: grid;
  gap: 1.2rem;
  margin-top: 1.6rem;
  padding: 1.5rem;
  border-radius: var(--radius-l);
  border: 1px solid var(--line-cyan);
  background: linear-gradient(160deg, rgba(0, 229, 199, .10), rgba(255, 107, 74, .10));
}

.page-faq .faq-support__main h3 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  color: var(--cream);
  margin: 0 0 .6rem;
}

.page-faq .faq-support__main p {
  margin: 0 0 1.1rem;
  font-size: .96rem;
  line-height: 1.78;
  color: var(--cream);
  opacity: .84;
  max-width: 52ch;
}

.page-faq .faq-support__main a:not(.btn) {
  color: var(--cyan);
  text-underline-offset: 3px;
}

.page-faq .faq-support__label {
  margin: 0 0 .7rem;
  font-size: .8rem;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-faq .faq-support__side {
  display: grid;
  gap: .6rem;
  align-content: start;
}

.page-faq .faq-support__side .copy-chip {
  text-align: left;
}

@media (min-width: 860px) {
  .page-faq .faq-support {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
    gap: 2rem;
  }
}

.page-faq .faq-foot-note {
  margin: 1.4rem 0 0;
  font-size: .88rem;
  line-height: 1.75;
  color: var(--mist);
}