.page-faq {
  --faq-rail: 218px;
  --faq-gap: clamp(26px, 4vw, 62px);
  --faq-step-line: 1px solid rgba(28, 92, 107, .62);
  background: var(--night);
  color: var(--paper);
  padding-bottom: 1px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(40px, 6vw, 84px) 0 clamp(34px, 4.5vw, 60px);
  border-bottom: 1px solid var(--line);
  background:
    repeating-linear-gradient(90deg, rgba(52, 231, 228, .05) 0 1px, transparent 1px 68px),
    linear-gradient(180deg, rgba(10, 18, 48, 1) 0%, rgba(10, 18, 48, .55) 100%);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: 20px;
}

.page-faq .faq-hero__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(34px, 6.4vw, 60px);
  line-height: 1.06;
  letter-spacing: .01em;
  margin: 0;
  max-width: 18ch;
  text-transform: none;
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--mist-lift);
}

.page-faq .faq-hero__tags {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 非对称主壳 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  padding: clamp(38px, 5.5vw, 76px) 0 clamp(56px, 7vw, 104px);
}

/* ---------- 问题轨道 ---------- */
.page-faq .faq-rail {
  border-top: 2px solid var(--cyan);
  padding-top: 16px;
}

.page-faq .faq-rail__title {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--mist);
  margin: 0 0 14px;
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: row;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  padding-bottom: 4px;
}

.page-faq .faq-rail__item {
  flex: 0 0 auto;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  background: var(--coal);
  color: var(--paper);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.4;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease);
  white-space: nowrap;
}

.page-faq .faq-rail__index {
  font-size: 11px;
  color: var(--orange);
  letter-spacing: .08em;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-color: var(--cyan);
  background: rgba(52, 231, 228, .1);
}

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

/* ---------- 答案流 ---------- */
.page-faq .faq-flow {
  display: grid;
  gap: 0;
  min-width: 0;
}

.page-faq .faq-item {
  position: relative;
  padding: clamp(26px, 3.4vw, 42px) 0 clamp(30px, 3.8vw, 46px);
  border-top: 1px solid var(--line);
  scroll-margin-top: 108px;
}

.page-faq .faq-item:first-child {
  border-top-width: 2px;
  border-top-color: var(--edge);
}

.page-faq .faq-item:target {
  box-shadow: inset 3px 0 0 0 var(--cyan);
  padding-left: clamp(14px, 2vw, 24px);
  background: linear-gradient(90deg, rgba(52, 231, 228, .06) 0%, transparent 62%);
}

.page-faq .faq-item__num {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--orange);
  margin: 0 0 10px;
}

.page-faq .faq-item:target .faq-item__num {
  color: var(--cyan);
}

.page-faq .faq-item__q {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(21px, 2.9vw, 32px);
  line-height: 1.24;
  margin: 0 0 14px;
  max-width: 26ch;
}

.page-faq .faq-item__lead {
  margin: 0 0 18px;
  max-width: 56ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--mist-lift);
}

.page-faq .faq-item p:not(.faq-item__lead):not(.faq-item__num):not(.note-plate) {
  max-width: 58ch;
  line-height: 1.85;
  font-size: 16.5px;
  margin: 0 0 16px;
}

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

.page-faq .faq-item a:hover {
  color: var(--amber);
}

/* ---------- 步骤列表 ---------- */
.page-faq .faq-steps {
  list-style: none;
  counter-reset: faq-step;
  margin: 6px 0 20px;
  padding: 0;
  max-width: 62ch;
}

.page-faq .faq-step {
  counter-increment: faq-step;
  position: relative;
  padding: 0 0 16px 46px;
  line-height: 1.8;
  font-size: 16px;
  color: var(--paper);
}

.page-faq .faq-step::before {
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--orange);
}

.page-faq .faq-step::after {
  content: "";
  position: absolute;
  left: 19px;
  top: 26px;
  bottom: 2px;
  width: 1px;
  background: rgba(28, 92, 107, .7);
}

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

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

.page-faq .faq-step strong {
  font-weight: 900;
  color: var(--paper);
}

/* ---------- 说明牌 ---------- */
.page-faq .note-plate {
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist-lift);
  margin: 0 0 20px;
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 6px 0 24px;
  max-width: 720px;
}

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

.page-faq .faq-figure .figure-frame__caption {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 页尾入口 ---------- */
.page-faq .faq-exits {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(10, 18, 48, 1) 0%, rgba(5, 7, 13, 1) 100%);
}

.page-faq .faq-exit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: clamp(24px, 3.6vw, 44px);
}

.page-faq .faq-exit {
  position: relative;
  display: grid;
  gap: 10px;
  padding: 26px 24px 24px;
  border: 1px solid var(--line);
  background: var(--coal);
  color: var(--paper);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-exit:hover,
.page-faq .faq-exit:focus-visible {
  border-color: var(--cyan);
  background: rgba(20, 22, 28, 1);
  transform: translateY(-3px);
}

.page-faq .faq-exit:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-exit__kicker {
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--orange);
}

.page-faq .faq-exit__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 22px;
  letter-spacing: .02em;
}

.page-faq .faq-exit__desc {
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist-lift);
}

.page-faq .faq-exit__arrow {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--cyan);
  line-height: 1;
}

/* ---------- 平板以上：轨道转竖排并粘性 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: end;
    column-gap: clamp(28px, 5vw, 72px);
  }

  .page-faq .faq-hero__lede {
    grid-column: 1;
  }

  .page-faq .faq-hero__tags {
    grid-column: 1 / -1;
  }

  .page-faq .faq-exit-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    column-gap: clamp(40px, 4.5vw, 76px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__item {
    flex: initial;
  }

  .page-faq .faq-rail__link {
    border: 0;
    border-left: 2px solid rgba(107, 118, 144, .3);
    background: transparent;
    padding: 10px 0 10px 14px;
    white-space: normal;
    font-size: 14.5px;
    color: var(--mist-lift);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-exit,
  .page-faq .faq-rail__link {
    transition-duration: .01ms;
  }

  .page-faq .faq-exit:hover,
  .page-faq .faq-exit:focus-visible {
    transform: none;
  }
}