.page-faq {
  --faq-rail-w: 236px;
  --faq-edge: rgba(47, 230, 214, .35);
  display: block;
  background: var(--ink);
  color: var(--paper);
  overflow-x: clip;
}

.page-faq .page-faq__crumbs {
  padding-top: 1rem;
}

.page-faq .breadcrumbs {
  font-size: .8rem;
  letter-spacing: .02em;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  margin-top: .75rem;
  padding: 2.25rem 0 2.75rem;
  background:
    linear-gradient(158deg, #0d1638 0%, #0B1230 42%, #05070F 100%);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -18%;
  width: 62%;
  height: 150%;
  background: linear-gradient(190deg, rgba(47, 230, 214, .16), rgba(47, 230, 214, 0) 62%);
  transform: skewX(-14deg);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 38%;
  height: 3px;
  background: linear-gradient(90deg, var(--amber), rgba(242, 179, 74, 0));
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.page-faq .faq-hero__copy h1 {
  margin: .5rem 0 0;
  font-family: var(--font-head);
  font-size: clamp(2rem, 8vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--paper);
  max-width: 18em;
}

.page-faq .faq-hero__copy .lead {
  margin: 1.1rem 0 0;
  max-width: 46ch;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.75rem;
  margin-top: 1.6rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-stat {
  display: flex;
  flex-direction: column;
  gap: .2rem;
}

.page-faq .faq-stat .num {
  font-family: var(--font-mono);
  font-size: 1.7rem;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-stat__label {
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--line-soft);
  background: #05070F;
}

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

/* ---------- 主体两栏 ---------- */

.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
  padding: 2.25rem 0 4rem;
}

.page-faq .faq-rail {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: rgba(22, 34, 61, .5);
  padding: 1rem 1rem 1.1rem;
}

.page-faq .faq-rail__title {
  margin: 0 0 .7rem;
  font-family: var(--font-head);
  font-size: .76rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .2rem .6rem;
  counter-reset: faqrail;
}

.page-faq .rail__link {
  counter-increment: faqrail;
  display: flex;
  align-items: baseline;
  gap: .5rem;
  padding: .42rem .38rem;
  font-size: .88rem;
  line-height: 1.4;
  color: var(--mist);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color .18s ease, border-color .18s ease, background .18s ease;
}

.page-faq .rail__link::before {
  content: "0" counter(faqrail);
  font-family: var(--font-mono);
  font-size: .7rem;
  color: rgba(143, 163, 196, .72);
}

.page-faq .rail__link:hover,
.page-faq .rail__link:focus-visible {
  color: var(--paper);
  border-left-color: var(--faq-edge);
  background: rgba(47, 230, 214, .06);
}

.page-faq .rail__link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(47, 230, 214, .09);
}

.page-faq .rail__link[aria-current="true"]::before {
  color: var(--amber);
}

/* ---------- 问答分组 ---------- */

.page-faq .faq-block {
  padding-top: 1.75rem;
  margin-top: 2.25rem;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 8rem;
}

.page-faq .faq-block:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.page-faq .section__head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .5rem 1rem;
  align-items: start;
  margin-bottom: 1.25rem;
}

.page-faq .section__index {
  font-family: var(--font-head);
  font-size: 2.1rem;
  line-height: .9;
  letter-spacing: .02em;
  color: rgba(47, 230, 214, .3);
  -webkit-text-stroke: 1px rgba(47, 230, 214, .6);
}

.page-faq .section__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.3rem, 4.4vw, 1.85rem);
  line-height: 1.2;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-faq .section__sub {
  margin: .4rem 0 0;
  font-size: .92rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-figure {
  margin: 0 0 1.25rem;
  border: 1px solid var(--line-soft);
  background: #05070F;
}

.page-faq .faq-figure .media-frame__caption {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .02em;
  color: var(--mist);
}

/* ---------- 可展开内容组 ---------- */

.page-faq .disclosure {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(22, 34, 61, .8), rgba(11, 18, 48, .5));
  overflow: hidden;
  transition: border-color .2s ease;
}

.page-faq .disclosure + .disclosure {
  margin-top: .6rem;
}

.page-faq .disclosure:hover,
.page-faq .disclosure:focus-within {
  border-color: var(--faq-edge);
}

.page-faq .disclosure__btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.05rem;
  background: none;
  border: 0;
  color: var(--paper);
  font-family: var(--font-head);
  font-size: 1.02rem;
  line-height: 1.4;
  letter-spacing: .01em;
  text-align: left;
  cursor: pointer;
}

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

.page-faq .disclosure__icon {
  position: relative;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  border: 1px solid var(--faq-edge);
  border-radius: 50%;
  transition: transform .2s ease, background-color .2s ease;
}

.page-faq .disclosure__icon::before,
.page-faq .disclosure__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan);
  transform: translate(-50%, -50%);
}

.page-faq .disclosure__icon::before {
  width: 8px;
  height: 1px;
}

.page-faq .disclosure__icon::after {
  width: 1px;
  height: 8px;
  transition: opacity .2s ease;
}

.page-faq .disclosure__btn[aria-expanded="true"] .disclosure__icon {
  background: rgba(47, 230, 214, .16);
  transform: rotate(90deg);
}

.page-faq .disclosure__btn[aria-expanded="true"] .disclosure__icon::after {
  opacity: 0;
}

.page-faq .disclosure__panel {
  padding: .95rem 1.05rem 1.15rem;
  border-top: 1px solid var(--line-soft);
  background: rgba(22, 34, 61, .55);
  font-size: .95rem;
  line-height: 1.78;
  color: var(--paper);
}

.page-faq .disclosure__panel p {
  margin: 0;
}

.page-faq .disclosure__panel p + p {
  margin-top: .7rem;
}

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

/* ---------- 字段清单 ---------- */

.page-faq .faq-fields {
  display: grid;
  grid-template-columns: 1fr;
  gap: .35rem .9rem;
  margin: .9rem 0 0;
  font-size: .9rem;
}

.page-faq .faq-fields dt {
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-faq .faq-fields dd {
  margin: 0 0 .45rem;
  color: var(--mist);
  line-height: 1.7;
  padding-bottom: .45rem;
  border-bottom: 1px dashed var(--line-soft);
}

.page-faq .faq-fields dd:last-of-type {
  margin-bottom: 0;
  border-bottom: 0;
  padding-bottom: 0;
}

/* ---------- 字段悬停提示 ---------- */

.page-faq .faq-term {
  position: relative;
  color: var(--cyan);
  border-bottom: 1px dashed var(--faq-edge);
  cursor: help;
}

.page-faq .faq-term__tip {
  position: absolute;
  left: 0;
  bottom: calc(100% + 8px);
  z-index: 5;
  width: max-content;
  max-width: 220px;
  padding: .45rem .6rem;
  font-family: var(--font-body);
  font-size: .75rem;
  line-height: 1.55;
  color: var(--paper);
  background: var(--ink-deep);
  border: 1px solid var(--faq-edge);
  border-radius: var(--radius);
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity .18s ease, transform .18s ease, visibility .18s ease;
}

.page-faq .faq-term:hover .faq-term__tip,
.page-faq .faq-term:focus .faq-term__tip,
.page-faq .faq-term:focus-within .faq-term__tip {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ---------- 联系步骤 ---------- */

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .8rem;
  counter-reset: faqstep;
}

.page-faq .faq-steps li {
  position: relative;
  padding: 1rem 1.05rem 1.05rem 3.5rem;
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--faq-edge);
  border-radius: var(--radius);
  background: rgba(22, 34, 61, .55);
}

.page-faq .faq-steps li::before {
  counter-increment: faqstep;
  content: "0" counter(faqstep);
  position: absolute;
  left: 1rem;
  top: 1.05rem;
  padding: .1rem .38rem;
  font-family: var(--font-mono);
  font-size: .76rem;
  color: var(--ink-deep);
  background: var(--cyan);
  border-radius: 1px;
}

.page-faq .faq-steps__title {
  display: block;
  margin-bottom: .35rem;
  font-family: var(--font-head);
  font-size: 1.05rem;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-faq .faq-steps__text {
  margin: 0;
  font-size: .92rem;
  line-height: 1.72;
  color: var(--mist);
}

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

.page-faq .faq-contact {
  display: grid;
  gap: .6rem;
  margin-top: 1.4rem;
  padding: 1.1rem 1.05rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: rgba(5, 7, 15, .5);
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem .75rem;
}

.page-faq .faq-contact__label {
  min-width: 5.5rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-contact__value {
  font-family: var(--font-mono);
  font-size: .88rem;
  color: var(--paper);
  word-break: break-all;
}

/* ---------- 尾部指引 ---------- */

.page-faq .faq-next {
  margin-top: 3rem;
  padding: 1.5rem 1.25rem 1.6rem;
  border: 1px solid var(--line-soft);
  border-top: 3px solid var(--amber);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(22, 34, 61, .85), rgba(11, 18, 48, .6));
}

.page-faq .faq-next__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.3rem;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-faq .faq-next__text {
  margin: .65rem 0 0;
  max-width: 56ch;
  font-size: .94rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin-top: 1.1rem;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-hero {
    padding: 3rem 0 3.5rem;
  }

  .page-faq .faq-fields {
    grid-template-columns: max-content 1fr;
    align-items: baseline;
  }

  .page-faq .faq-fields dd {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .page-faq .faq-fields dt {
    padding-bottom: .5rem;
    border-bottom: 1px dashed var(--line-soft);
  }

  .page-faq .faq-fields dd {
    padding-bottom: .5rem;
    border-bottom: 1px dashed var(--line-soft);
  }

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

  .page-faq .faq-steps li {
    padding: 3.2rem 1rem 1.1rem;
  }

  .page-faq .faq-steps li::before {
    top: 1.1rem;
    left: 1rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
    gap: 2.5rem;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 3rem;
    padding: 3rem 0 4.5rem;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 8.5rem;
    align-self: start;
  }

  .page-faq .rail__list {
    grid-template-columns: 1fr;
  }

  .page-faq .section__head {
    grid-template-columns: 3.2rem minmax(0, 1fr);
    gap: 1rem;
  }

  .page-faq .section__index {
    font-size: 2.6rem;
  }

  .page-faq .faq-next {
    padding: 1.75rem 1.75rem 1.85rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .disclosure__icon,
  .page-faq .faq-term__tip,
  .page-faq .rail__link,
  .page-faq .disclosure {
    transition: none;
  }

  .page-faq .disclosure__btn[aria-expanded="true"] .disclosure__icon {
    transform: none;
  }
}