/* ===== 问答中心 /questions/ ===== */
.page-faq {
  --faq-green-glass: rgba(31, 217, 126, 0.08);
  --faq-amber-glass: rgba(255, 176, 32, 0.12);
  --faq-sticky-gap: 24px;
}

/* --- 面包屑 --- */
.page-faq .breadcrumbs {
  padding: 22px 0 0;
}
.page-faq .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--gray);
}
.page-faq .breadcrumbs .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--gray);
  opacity: 0.6;
}
.page-faq .breadcrumbs a {
  color: var(--silver);
  text-decoration: none;
  transition: color 160ms var(--ease);
}
.page-faq .breadcrumbs a:hover,
.page-faq .breadcrumbs a:focus-visible {
  color: var(--green);
}

/* --- 首屏 --- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 6vw, 64px) 0 clamp(30px, 5vw, 54px);
  border-bottom: 1px solid var(--line);
  background-image:
    linear-gradient(rgba(195, 207, 218, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(195, 207, 218, 0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  background-position: right top;
}
.page-faq .faq-hero h1 {
  margin: 14px 0 18px;
  max-width: 22ch;
  font-size: clamp(30px, 7.2vw, 60px);
  font-weight: 200;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.page-faq .faq-hero h1::after {
  content: "";
  display: block;
  width: 64px;
  height: 3px;
  margin-top: 22px;
  background: linear-gradient(90deg, var(--green), var(--green-deep));
}
.page-faq .faq-hero .lede {
  max-width: 64ch;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--silver);
}
.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-hero__facts li {
  padding-left: 14px;
  border-left: 2px solid var(--green);
}
.page-faq .faq-hero__facts strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-faq .faq-hero__facts span {
  display: block;
  margin-top: 3px;
  font-size: 12px;
  color: var(--gray);
}
@media (min-width: 760px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* --- 三步区块 --- */
.page-faq .faq-steps {
  padding: clamp(36px, 6vw, 72px) 0 0;
}
.page-faq .faq-steps .section-head {
  margin-bottom: 26px;
}
.page-faq .faq-steps__media {
  margin: 0 0 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-900);
}
.page-faq .faq-steps__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .step-track {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .step-track__item {
  position: relative;
  padding: 20px 18px 22px;
  background: linear-gradient(160deg, rgba(12, 24, 38, 0.9), rgba(6, 16, 25, 0.95));
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.page-faq .step-track__num {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--green);
  background: var(--faq-green-glass);
  border: 1px solid rgba(31, 217, 126, 0.4);
  border-radius: var(--radius);
}
.page-faq .step-track__title {
  margin: 14px 0 10px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--paper);
}
.page-faq .step-track__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--silver);
}
@media (min-width: 900px) {
  .page-faq .step-track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
  .page-faq .step-track__item::after {
    content: "";
    position: absolute;
    top: 46px;
    right: -18px;
    width: 18px;
    height: 2px;
    background: linear-gradient(90deg, var(--green), var(--green-deep));
  }
  .page-faq .step-track__item:last-child::after {
    display: none;
  }
}

/* --- 正文分栏 --- */
.page-faq .faq-body {
  padding: clamp(40px, 7vw, 84px) 0 0;
}
.page-faq .faq-body .section-head {
  margin-bottom: 28px;
}
.page-faq .faq-layout {
  display: grid;
  gap: 28px;
}
@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(196px, 232px) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }
}

/* --- 左侧索引 --- */
.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray);
}
.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  font-size: 13px;
  color: var(--silver);
  text-decoration: none;
  white-space: nowrap;
  background: rgba(12, 24, 38, 0.5);
  border: 1px solid var(--line);
  border-left: 2px solid transparent;
  border-radius: var(--radius);
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease);
}
.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--paper);
  background: var(--faq-green-glass);
  border-color: var(--line-strong);
  border-left-color: var(--green);
}
.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gray);
}
.page-faq .faq-index__figure {
  display: none;
}
@media (min-width: 980px) {
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + var(--faq-sticky-gap));
  }
  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding: 0;
  }
  .page-faq .faq-index__list li + li {
    margin-top: 6px;
  }
  .page-faq .faq-index__link {
    white-space: normal;
  }
  .page-faq .faq-index__figure {
    display: block;
    margin: 26px 0 0;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--ink-900);
  }
  .page-faq .faq-index__figure img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: cover;
  }
}

/* --- 问答分组 --- */
.page-faq .faq-group {
  margin-bottom: clamp(32px, 5vw, 52px);
  scroll-margin-top: calc(var(--header-h) + var(--faq-sticky-gap));
}
.page-faq .faq-group:last-child {
  margin-bottom: 0;
}
.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-strong);
}
.page-faq .faq-group__num {
  grid-row: 1 / span 2;
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--green);
}
.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(19px, 3vw, 26px);
  font-weight: 600;
  line-height: 1.3;
  color: var(--paper);
}
.page-faq .faq-group__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray);
}

/* --- 折叠问答微调 --- */
.page-faq .faq-group .collapse {
  border-bottom: 1px solid var(--line);
  transition: border-color 200ms var(--ease);
}
.page-faq .faq-group .collapse.is-open {
  border-bottom-color: rgba(31, 217, 126, 0.5);
}
.page-faq .faq-group .collapse__trigger {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  text-align: left;
  color: var(--paper);
  transition: color 160ms var(--ease);
}
.page-faq .faq-group .collapse__trigger:hover,
.page-faq .faq-group .collapse__trigger:focus-visible {
  color: var(--green-soft);
}
.page-faq .faq-group .collapse__panel p {
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--silver);
}
.page-faq .faq-group .collapse__panel p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-group .collapse__panel .tag {
  display: inline-block;
  margin: 0 2px;
  vertical-align: baseline;
}
.page-faq .faq-inline-link {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 217, 126, 0.4);
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.page-faq .faq-inline-link:hover,
.page-faq .faq-inline-link:focus-visible {
  color: var(--green-soft);
  border-bottom-color: var(--green-soft);
}

/* --- 收束区 --- */
.page-faq .faq-next {
  padding: clamp(40px, 6vw, 78px) 0 clamp(28px, 4vw, 48px);
}
.page-faq .faq-next__inner {
  display: grid;
  gap: 24px;
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(31, 217, 126, 0.1), rgba(12, 24, 38, 0.78) 58%),
    var(--ink-900);
}
.page-faq .faq-next__inner h2 {
  margin: 8px 0 12px;
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 200;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-faq .faq-next__inner p {
  max-width: 62ch;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--silver);
}
.page-faq .faq-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
@media (min-width: 900px) {
  .page-faq .faq-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 40px;
  }
  .page-faq .faq-next__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-group .collapse,
  .page-faq .faq-group .collapse__trigger,
  .page-faq .faq-inline-link,
  .page-faq .breadcrumbs a {
    transition: none;
  }
}