.page-faq {
  background: var(--ink);
  color: var(--white);
}

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 26px 0 28px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(198, 255, 61, .15), transparent 56%),
    radial-gradient(90% 80% at 0% 100%, rgba(18, 53, 43, .75), transparent 62%),
    var(--ink);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -120px;
  width: 300px;
  height: 300px;
  background: linear-gradient(150deg, rgba(198, 255, 61, .2), transparent 68%);
  transform: rotate(-14deg);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-kicker {
  margin: 16px 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--volt);
}

.page-faq .faq-title {
  margin: 0 0 14px;
  max-width: 24ch;
  font-size: clamp(26px, 6.4vw, 48px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-faq .faq-lead {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-meta__item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--mist);
}

.page-faq .faq-meta__num {
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--volt);
}

.page-faq .faq-shell {
  display: grid;
  gap: 20px;
  padding-top: 24px;
  padding-bottom: 44px;
}

/* 步骤轨道：移动端为横向胶囊条 */
.page-faq .faq-rail {
  min-width: 0;
}

.page-faq .faq-rail__eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px 5px 5px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(18, 32, 58, .7);
  color: var(--mist);
  text-decoration: none;
  transition: color .2s var(--ease-out), border-color .2s var(--ease-out), background .2s var(--ease-out);
}

.page-faq .faq-rail__num {
  flex: none;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--volt);
}

.page-faq .faq-rail__label {
  font-size: 12px;
  line-height: 1.4;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--white);
  border-color: var(--volt-deep);
}

.page-faq .faq-rail__link.is-current {
  background: var(--volt);
  border-color: var(--volt);
  color: var(--ink);
}

.page-faq .faq-rail__link.is-current .faq-rail__num {
  color: var(--ink);
  border-color: rgba(10, 17, 32, .35);
  background: rgba(10, 17, 32, .1);
}

.page-faq .faq-rail__sub {
  display: none;
}

/* 正文 */
.page-faq .faq-body {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.page-faq .faq-step {
  position: relative;
  min-width: 0;
  padding: 22px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background: linear-gradient(180deg, rgba(18, 32, 58, .95), rgba(18, 32, 58, .62));
  box-shadow: var(--shadow-panel);
  overflow: hidden;
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 3px;
  height: 40px;
  background: linear-gradient(180deg, var(--volt), transparent);
  border-radius: 0 3px 3px 0;
}

.page-faq .faq-step__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.page-faq .faq-step__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--volt);
}

.page-faq .faq-step__title {
  margin: 0;
  font-size: clamp(19px, 4.4vw, 26px);
  font-weight: 800;
  line-height: 1.26;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-mini {
  list-style: none;
  counter-reset: faq-mini;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-mini > li {
  position: relative;
  counter-increment: faq-mini;
  padding-left: 32px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ice);
}

.page-faq .faq-mini > li::before {
  content: counter(faq-mini);
  position: absolute;
  left: 0;
  top: 5px;
  display: grid;
  place-items: center;
  width: 21px;
  height: 21px;
  border: 1px solid var(--volt-deep);
  border-radius: 6px;
  background: rgba(198, 255, 61, .1);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--volt);
}

.page-faq .faq-mini a,
.page-faq .faq-qa__body a,
.page-faq .faq-note a {
  color: var(--volt);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, .38);
}

.page-faq .faq-mini a:hover,
.page-faq .faq-qa__body a:hover,
.page-faq .faq-note a:hover {
  border-bottom-color: var(--volt);
}

.page-faq .faq-sub {
  margin: 0 0 10px;
  font-size: 13px;
  line-height: 1.9;
  color: var(--mist);
}

.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-chip {
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(10, 17, 32, .5);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--ice);
}

.page-faq .faq-chip--volt {
  border-color: rgba(198, 255, 61, .55);
  color: var(--volt);
}

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

.page-faq .faq-points > li {
  position: relative;
  padding-left: 20px;
  font-size: 13px;
  line-height: 1.9;
  color: var(--mist);
}

.page-faq .faq-points > li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .84em;
  width: 7px;
  height: 7px;
  background: var(--volt);
}

.page-faq .faq-figure {
  margin: 0 0 16px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-m);
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.9;
  color: var(--mist);
}

.page-faq .faq-alerts {
  display: grid;
  gap: 8px;
  margin: 0 0 16px;
}

.page-faq .faq-alert {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 14px;
  border: 1px solid rgba(255, 90, 43, .38);
  border-radius: var(--radius-m);
  background: rgba(255, 90, 43, .09);
}

.page-faq .faq-alert__k {
  flex: none;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--flame);
}

.page-faq .faq-alert__v {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ice);
}

.page-faq .faq-tip {
  margin: 0;
  padding: 14px 16px;
  border-radius: var(--radius-m);
  background: var(--paper);
  color: rgba(10, 17, 32, .82);
  font-size: 14px;
  line-height: 1.85;
}

.page-faq .faq-flow {
  margin: 0 0 16px;
}

.page-faq .faq-flow svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-flow__box {
  fill: rgba(10, 17, 32, .82);
  stroke: var(--line);
  stroke-width: 1.5;
}

.page-faq .faq-flow__box--end {
  fill: rgba(198, 255, 61, .14);
  stroke: var(--volt-deep);
}

.page-faq .faq-flow__label {
  fill: var(--ice);
  font-family: var(--font-body);
  font-size: 14px;
}

.page-faq .faq-flow__arrow {
  fill: none;
  stroke: var(--volt);
  stroke-width: 2;
  stroke-linecap: round;
}

/* 浅色分区，用于打断深色长滚动 */
.page-faq .faq-step--light {
  background: var(--ice);
  border-color: rgba(10, 17, 32, .14);
  box-shadow: none;
}

.page-faq .faq-step--light::before {
  background: linear-gradient(180deg, var(--ink), transparent);
}

.page-faq .faq-step--light .faq-step__num,
.page-faq .faq-step--light .faq-step__title {
  color: var(--ink);
}

.page-faq .faq-step--light .faq-mini > li {
  color: rgba(10, 17, 32, .84);
}

.page-faq .faq-step--light .faq-mini > li::before {
  color: var(--pitch);
  border-color: rgba(18, 53, 43, .5);
  background: rgba(198, 255, 61, .45);
}

.page-faq .faq-step--light .faq-mini a {
  color: var(--pitch);
  border-bottom-color: rgba(18, 53, 43, .4);
}

.page-faq .faq-step--light .faq-alert {
  border-color: rgba(255, 90, 43, .45);
  background: rgba(255, 255, 255, .55);
}

.page-faq .faq-step--light .faq-alert__v {
  color: rgba(10, 17, 32, .84);
}

/* 问答区 */
.page-faq .faq-qa {
  display: grid;
  gap: 10px;
  margin: 0 0 14px;
}

.page-faq .faq-qa__item {
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: rgba(10, 17, 32, .55);
  overflow: hidden;
  transition: border-color .2s var(--ease-out);
}

.page-faq .faq-qa__item:target {
  border-color: var(--volt-deep);
}

.page-faq .faq-qa__item summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 15px;
  list-style: none;
  cursor: pointer;
  font-size: 14.5px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--white);
}

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

.page-faq .faq-qa__item summary::after {
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--volt);
}

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

.page-faq .faq-qa__item[open] {
  border-color: rgba(198, 255, 61, .45);
}

.page-faq .faq-qa__body {
  margin: 0;
  padding: 0 15px 15px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--mist);
}

.page-faq .faq-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.9;
  color: var(--mist);
}

/* 收尾动作带 */
.page-faq .faq-cta {
  display: grid;
  gap: 14px;
  padding: 22px 20px;
  border: 1px solid rgba(198, 255, 61, .35);
  border-radius: var(--radius-l);
  background:
    linear-gradient(135deg, rgba(198, 255, 61, .13), rgba(18, 53, 43, .6) 52%, rgba(18, 32, 58, .92));
}

.page-faq .faq-cta__text {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ice);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (min-width: 700px) {
  .page-faq .faq-step {
    padding: 28px 26px;
  }

  .page-faq .faq-cta {
    padding: 28px 26px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 34px 0 34px;
  }

  .page-faq .faq-shell {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 46px;
    padding-top: 42px;
    padding-bottom: 60px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 40px;
    align-self: start;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
    position: relative;
    margin-bottom: 16px;
  }

  .page-faq .faq-rail__list::before {
    content: "";
    position: absolute;
    left: 17px;
    top: 14px;
    bottom: 14px;
    width: 1px;
    background: linear-gradient(180deg, var(--line), rgba(38, 55, 79, .15));
  }

  .page-faq .faq-rail__link {
    position: relative;
    z-index: 1;
    padding: 5px 8px 5px 4px;
    border-color: transparent;
    border-radius: 10px;
    background: transparent;
  }

  .page-faq .faq-rail__num {
    background: var(--ink);
  }

  .page-faq .faq-rail__label {
    font-size: 13px;
  }

  .page-faq .faq-rail__link.is-current {
    background: transparent;
    color: var(--white);
  }

  .page-faq .faq-rail__link.is-current .faq-rail__num {
    background: var(--volt);
    border-color: var(--volt);
    color: var(--ink);
  }

  .page-faq .faq-rail__sub {
    display: grid;
    gap: 2px;
    margin-left: 22px;
    padding-left: 12px;
    border-left: 1px dashed var(--line);
  }

  .page-faq .faq-rail__sub-link {
    display: block;
    padding: 4px 0;
    font-size: 12px;
    line-height: 1.6;
    color: var(--mist);
    text-decoration: none;
    transition: color .2s var(--ease-out);
  }

  .page-faq .faq-rail__sub-link:hover,
  .page-faq .faq-rail__sub-link:focus-visible {
    color: var(--volt);
  }

  .page-faq .faq-body {
    gap: 22px;
  }

  .page-faq .faq-figure {
    max-width: 460px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-shell {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 60px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail__link,
  .page-faq .faq-qa__item,
  .page-faq .faq-rail__sub-link {
    transition: none;
  }
}
</main>