.page-faq {
  --faq-node: 48px;
  --faq-gap: clamp(20px, 3vw, 34px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(34px, 6vw, 74px) 0 clamp(26px, 4vw, 46px);
  isolation: isolate;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: min(48vw, 580px);
  height: 76%;
  background: linear-gradient(150deg, rgba(14, 59, 58, 0.62), rgba(19, 30, 56, 0) 72%);
  border-left: 1px solid var(--line);
  pointer-events: none;
  z-index: -1;
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(16px, 2.6vw, 28px);
  align-items: end;
}

.page-faq .faq-hero .display {
  margin: 14px 0 0;
  line-height: 1.05;
  max-width: 18ch;
}

.page-faq .faq-hero__text {
  margin: 0 0 8px;
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    column-gap: clamp(28px, 5vw, 72px);
  }

  .page-faq .faq-hero__text {
    padding-left: clamp(16px, 2vw, 24px);
    border-left: 1px solid var(--line);
  }
}

/* ---------- 主栅格 ---------- */
.page-faq .faq-layout {
  align-items: start;
  margin-top: clamp(30px, 5vw, 56px);
}

.page-faq .faq-rail {
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.page-faq .faq-body > section {
  padding-block: clamp(34px, 5.5vw, 62px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-body > section:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-body .section__head {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-faq .faq-body .section__title {
  max-width: 24ch;
}

.page-faq .faq-body .section__lead {
  max-width: 52ch;
}

/* ---------- 三选一 ---------- */
.page-faq .faq-picker {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-pick {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 2.8vw, 30px);
  background: var(--ink);
  color: inherit;
  text-decoration: none;
  transition: background 0.35s var(--ease);
}

.page-faq .faq-pick:hover,
.page-faq .faq-pick:focus-visible {
  background: var(--indigo);
}

.page-faq .faq-pick__no {
  font-family: var(--font-num);
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-faq .faq-pick__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 700;
  color: var(--paper);
  line-height: 1.45;
}

.page-faq .faq-pick__text {
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-pick__meta {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-num);
  font-size: var(--fs-small);
  letter-spacing: 0.05em;
  color: var(--river);
}

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

/* ---------- 横向配图 ---------- */
.page-faq .faq-strip-media {
  margin: clamp(30px, 5vw, 52px) 0 0;
  border: 1px solid var(--line);
}

/* ---------- 步骤树 ---------- */
.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .step {
  position: relative;
  display: grid;
  grid-template-columns: var(--faq-node) minmax(0, 1fr);
  gap: clamp(14px, 2.2vw, 22px);
  padding-bottom: clamp(24px, 3.6vw, 38px);
}

.page-faq .step:last-child {
  padding-bottom: 0;
}

.page-faq .step::before {
  content: "";
  position: absolute;
  left: calc(var(--faq-node) / 2 - 1px);
  top: var(--faq-node);
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.page-faq .step:last-child::before {
  display: none;
}

.page-faq .step__num {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: var(--faq-node);
  height: var(--faq-node);
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--ink);
  font-family: var(--font-num);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--amber);
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease), color 0.3s var(--ease);
}

.page-faq .step:hover .step__num,
.page-faq .step:focus-within .step__num {
  background: var(--teal-deep);
  border-color: var(--river);
  color: var(--paper);
}

.page-faq .step__body {
  padding-top: 5px;
}

.page-faq .step__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}

.page-faq .step__text {
  margin: 0 0 10px;
  max-width: 44ch;
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .step__done {
  display: inline-block;
  margin: 0;
  padding: 3px 0 3px 12px;
  border-left: 2px solid var(--river);
  font-size: var(--fs-small);
  line-height: 1.6;
  color: var(--paper);
}

/* ---------- 卡点处理 ---------- */
.page-faq .faq-trouble {
  display: grid;
  gap: 1px;
  margin-top: clamp(26px, 4vw, 40px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-trouble__item {
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--indigo);
}

.page-faq .faq-trouble__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--amber);
}

.page-faq .faq-trouble__text {
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.8;
  color: var(--mist);
}

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

/* ---------- 换设备分栏 ---------- */
.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .faq-split {
  display: grid;
  gap: clamp(22px, 3.6vw, 44px);
}

.page-faq .faq-split__media {
  margin: 0;
  border: 1px solid var(--line);
}

@media (min-width: 1000px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    align-items: start;
  }
}

/* ---------- V3 章节带 ---------- */
.page-faq .faq-chapter {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-decoration: none;
  color: inherit;
  background: var(--indigo);
  border: 1px solid var(--line);
  padding: clamp(16px, 2vw, 22px);
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-faq .faq-chapter:hover,
.page-faq .faq-chapter:focus-visible {
  background: var(--ink);
  border-color: var(--amber);
}

.page-faq .faq-chapter__no {
  font-family: var(--font-num);
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--clay);
}

.page-faq .faq-chapter__name {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-faq .faq-chapter__note {
  font-size: var(--fs-small);
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-band-hint {
  margin: 14px 0 0;
  font-size: var(--fs-small);
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 收束区 ---------- */
.page-faq .faq-outro {
  margin-top: clamp(34px, 5vw, 64px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(14, 59, 58, 0.4), rgba(10, 26, 43, 0) 82%);
}

.page-faq .faq-outro__inner {
  display: grid;
  gap: 22px;
  padding-block: clamp(36px, 5.5vw, 66px);
}

.page-faq .faq-outro__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper);
}

.page-faq .faq-outro__text {
  margin: 0;
  max-width: 56ch;
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--mist);
}

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

@media (min-width: 880px) {
  .page-faq .faq-outro__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    column-gap: clamp(24px, 4vw, 60px);
  }

  .page-faq .faq-outro__links {
    flex-direction: column;
    align-items: stretch;
  }
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 620px) {
  .page-faq {
    --faq-node: 40px;
  }

  .page-faq .faq-hero .display {
    max-width: none;
  }

  .page-faq .step__num {
    font-size: 0.95rem;
  }

  .page-faq .step__text {
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-pick,
  .page-faq .faq-chapter,
  .page-faq .step__num {
    transition: none;
  }
}