.page-faq {
  --fq-index-w: 236px;
  --fq-gap: 20px;
  --fq-anim: 240ms;
  position: relative;
}

.page-faq .page-faq__crumb {
  padding-top: 18px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 18px 0 6px;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 92% at 86% 4%, rgba(53, 224, 208, 0.13), transparent 62%),
    linear-gradient(180deg, rgba(11, 37, 69, 0.72), transparent 74%);
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: 28px;
}

.page-faq .faq-hero__main {
  min-width: 0;
}

.page-faq .faq-hero h1 {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 8.2vw, 58px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .faq-hero__lead {
  margin: 0 0 22px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--fog);
}

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

.page-faq .faq-hero__aside {
  position: relative;
  min-width: 0;
  padding-right: 20px;
}

.page-faq .faq-hero__note {
  position: absolute;
  top: 0;
  right: 0;
  color: var(--steel);
}

.page-faq .faq-hero__figure .figure__media {
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-faq .faq-hero__status {
  margin-top: 14px;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  background: rgba(11, 37, 69, 0.72);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-hero__status-text {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 数字带 ---------- */
.page-faq .faq-strip {
  margin-top: 30px;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(90deg, rgba(22, 50, 79, 0.62), rgba(5, 19, 31, 0.1));
}

.page-faq .faq-strip__inner {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-top: 14px;
  padding-bottom: 14px;
  scrollbar-width: thin;
}

.page-faq .faq-strip__item {
  flex: 0 0 auto;
  min-width: 128px;
  padding: 10px 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: rgba(11, 37, 69, 0.66);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-faq .faq-strip__label {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel);
  font-family: var(--font-mono);
}

.page-faq .faq-strip__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--cyan);
}

.page-faq .faq-strip__unit {
  font-size: 12px;
  color: var(--steel);
}

/* ---------- 主体 ---------- */
.page-faq .faq-body {
  padding-top: 42px;
}

.page-faq .faq-body__head {
  margin-bottom: 26px;
}

.page-faq .faq-body__grid {
  display: grid;
  gap: 30px;
}

/* ---------- 索引栏 ---------- */
.page-faq .faq-index {
  position: relative;
  min-width: 0;
}

.page-faq .faq-index__vnote {
  display: none;
  position: absolute;
  top: 2px;
  right: 0;
  color: var(--steel);
}

.page-faq .faq-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 2px 10px;
  align-items: baseline;
  padding: 11px 12px 11px 14px;
  border-left: 2px solid var(--line-soft);
  background: rgba(11, 37, 69, 0.42);
  color: var(--white);
  text-decoration: none;
  transition: border-color var(--fq-anim) var(--ease), background var(--fq-anim) var(--ease), transform var(--fq-anim) var(--ease);
}

.page-faq .faq-index__num {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 16px;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1.2;
}

.page-faq .faq-index__name {
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
}

.page-faq .faq-index__count {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--steel);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-left-color: var(--cyan);
  background: rgba(22, 50, 79, 0.78);
  transform: translateX(2px);
}

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

.page-faq .faq-index__hint {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-answers {
  min-width: 0;
}

.page-faq .faq-group {
  margin-bottom: 38px;
}

.page-faq .faq-group:last-child {
  margin-bottom: 0;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 12px;
  padding-bottom: 11px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 4.6vw, 26px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-group__sub {
  flex: 1 1 100%;
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--line-soft);
  transition: background var(--fq-anim) var(--ease);
}

.page-faq .faq-item[open] {
  background: linear-gradient(90deg, rgba(53, 224, 208, 0.07), transparent 72%);
}

.page-faq .faq-item__q {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 44px 16px 14px;
  cursor: pointer;
  list-style: none;
  border-left: 3px solid transparent;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.58;
  color: var(--white);
  transition: border-color var(--fq-anim) var(--ease), color var(--fq-anim) var(--ease);
}

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

.page-faq .faq-item__q::after {
  content: "";
  position: absolute;
  right: 16px;
  top: 24px;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--steel);
  border-bottom: 2px solid var(--steel);
  transform: rotate(45deg);
  transition: transform var(--fq-anim) var(--ease), border-color var(--fq-anim) var(--ease);
}

.page-faq .faq-item__q:hover {
  color: var(--cyan);
}

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

.page-faq .faq-item[open] .faq-item__q {
  border-left-color: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__q::after {
  transform: rotate(225deg);
  border-color: var(--cyan);
}

.page-faq .faq-item__mark {
  flex: 0 0 auto;
  margin-top: 3px;
  padding: 1px 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  color: var(--cyan);
  border: 1px solid rgba(53, 224, 208, 0.45);
}

.page-faq .faq-item__text {
  min-width: 0;
}

.page-faq .faq-item__a {
  padding: 0 22px 20px 46px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fog);
}

.page-faq .faq-item__a > p {
  margin: 0 0 10px;
}

.page-faq .faq-item__a > p:last-child,
.page-faq .faq-item__a > ul:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item__a ul {
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 7px;
}

.page-faq .faq-item__a li {
  position: relative;
  padding-left: 18px;
}

.page-faq .faq-item__a li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 208, 0.4);
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  border-bottom-color: var(--cyan);
}

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

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

.page-faq .faq-figure .figure__media {
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-faq .faq-figure .figure__cap {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}

@media (prefers-reduced-motion: no-preference) {
  .page-faq .faq-item[open] .faq-item__a {
    animation: faq-expand var(--fq-anim) var(--ease) both;
  }
}

@keyframes faq-expand {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 收束段 ---------- */
.page-faq .faq-outro {
  padding: 8px 0 30px;
}

.page-faq .faq-outro__grid {
  display: grid;
  gap: 24px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-outro__title {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(21px, 5vw, 30px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-outro__text {
  margin: 0 0 20px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fog);
}

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

.page-faq .faq-outro__links {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-faq .faq-outro__links li {
  background: rgba(11, 37, 69, 0.56);
}

.page-faq .faq-outro__links a {
  display: block;
  padding: 13px 16px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--fog);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--fq-anim) var(--ease), border-color var(--fq-anim) var(--ease), background var(--fq-anim) var(--ease);
}

.page-faq .faq-outro__links a:hover,
.page-faq .faq-outro__links a:focus-visible {
  color: var(--white);
  border-left-color: var(--cyan);
  background: rgba(22, 50, 79, 0.8);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-strip__item {
    min-width: 150px;
  }

  .page-faq .faq-item__a {
    padding-left: 52px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding-top: 28px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-hero__aside {
    padding-right: 24px;
    margin-top: 6px;
  }

  .page-faq .faq-outro__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-body__grid {
    grid-template-columns: var(--fq-index-w) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--status-h) + 18px);
    padding-right: 26px;
  }

  .page-faq .faq-index__vnote {
    display: block;
  }
}

@media (max-width: 979px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  }
}

@media (max-width: 480px) {
  .page-faq .faq-hero__aside {
    padding-right: 18px;
  }

  .page-faq .faq-item__q {
    padding-right: 38px;
    font-size: 15px;
  }

  .page-faq .faq-item__a {
    padding: 0 14px 18px 16px;
  }
}