.page-faq {
  --faq-body: #C3D2E2;
  --faq-body-dim: #9FB2C7;
  --faq-rule: var(--c-grid);
  --faq-radius: 2px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(36px, 6.5vw, 84px) 0 clamp(26px, 4vw, 46px);
  border-bottom: 1px solid var(--faq-rule);
  background-image:
    radial-gradient(1100px 400px at 8% -12%, rgba(47, 191, 113, .13), transparent 62%),
    radial-gradient(820px 340px at 96% -4%, rgba(255, 138, 61, .09), transparent 60%),
    repeating-linear-gradient(90deg, rgba(30, 59, 92, .32) 0 1px, transparent 1px 88px);
  background-repeat: no-repeat, no-repeat, repeat;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
  align-items: end;
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
  }
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6vw, 66px);
  line-height: 1.04;
  letter-spacing: -.01em;
  color: var(--c-white);
  margin: 14px 0 0;
  max-width: 18ch;
}

.page-faq .faq-hero .lead {
  margin: 18px 0 0;
  max-width: 62ch;
  color: var(--faq-body);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
}

.page-faq .faq-hero__side {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

@media (min-width: 900px) {
  .page-faq .faq-hero__side {
    align-items: flex-end;
    text-align: right;
  }
}

.page-faq .faq-hero__side .annotation {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: .2em;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-green);
  height: 132px;
  align-self: flex-end;
}

.page-faq .faq-jump {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
  width: 100%;
}

.page-faq .faq-jump a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--faq-rule);
  border-left-width: 2px;
  background: var(--c-stand);
  color: var(--c-white);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.4;
  transition: border-color .22s var(--ease), color .22s var(--ease), background-color .22s var(--ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  border-left-color: var(--c-green);
  background: #14304C;
  color: var(--c-green-hi);
  outline: none;
}

.page-faq .faq-jump a:focus-visible {
  box-shadow: 0 0 0 2px var(--c-green-hi);
}

.page-faq .faq-jump__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--c-orange);
  flex: none;
}

/* ---------- 高频三问 ---------- */
.page-faq .faq-top3 {
  border-top: 0;
  padding-top: clamp(34px, 5.5vw, 64px);
}

.page-faq .faq-top3__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2.2vw, 24px);
  margin-top: clamp(20px, 3vw, 34px);
}

@media (min-width: 780px) {
  .page-faq .faq-top3__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-faq .faq-topcard {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--faq-rule);
  background: linear-gradient(180deg, var(--c-stand) 0%, rgba(16, 39, 63, .55) 100%);
  box-shadow: var(--shadow);
}

.page-faq .faq-topcard::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 46px;
  height: 3px;
  background: var(--c-orange);
}

.page-faq .faq-topcard--green::before {
  background: var(--c-green);
}

.page-faq .faq-topcard--orange::before {
  background: var(--c-coral);
}

.page-faq .faq-topcard__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--faq-body-dim);
}

.page-faq .faq-topcard h3 {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: clamp(15.5px, 1.7vw, 17px);
  line-height: 1.5;
  color: var(--c-white);
}

.page-faq .faq-topcard p:last-child {
  margin: 0;
  color: var(--faq-body);
  font-size: 14.5px;
  line-height: 1.8;
}

/* ---------- 主两栏 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: clamp(24px, 3.4vw, 46px);
  padding-top: clamp(38px, 5.5vw, 68px);
  padding-bottom: clamp(52px, 7vw, 92px);
}

@media (min-width: 1024px) {
  .page-faq .faq-shell {
    grid-template-columns: minmax(190px, 232px) minmax(0, 1fr);
    align-items: start;
  }
}

/* 索引 */
.page-faq .faq-index {
  border: 1px solid var(--faq-rule);
  background: rgba(16, 39, 63, .5);
  padding: 16px 14px 18px;
}

@media (min-width: 1024px) {
  .page-faq .faq-index {
    position: sticky;
    top: 92px;
  }
}

.page-faq .faq-index__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__list a {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 9px 8px;
  border-left: 2px solid transparent;
  color: var(--faq-body-dim);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.45;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--c-white);
  border-left-color: var(--c-green);
  background: rgba(47, 191, 113, .08);
  outline: none;
}

.page-faq .faq-index__list a:focus-visible {
  box-shadow: 0 0 0 2px var(--c-green-hi);
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-green);
}

.page-faq .faq-index__note {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--faq-rule);
  font-size: 12px;
  line-height: 1.7;
  color: var(--c-mist);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  border-top: 1px solid var(--faq-rule);
  padding-top: clamp(20px, 2.8vw, 30px);
  margin-top: clamp(24px, 3.4vw, 38px);
  scroll-margin-top: 96px;
}

.page-faq .faq-group:first-child {
  margin-top: 0;
}

.page-faq .faq-group__summary {
  display: flex;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  list-style: none;
  padding: 2px 0;
}

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

.page-faq .faq-group__summary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--c-green-hi);
}

.page-faq .faq-group__no {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  display: inline-flex;
  align-items: center;
  height: 46px;
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--c-mist);
}

.page-faq .faq-group__title {
  flex: 1 1 auto;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 2.5vw, 29px);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--c-white);
}

.page-faq .faq-group__sign {
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
}

.page-faq .faq-group__sign::before,
.page-faq .faq-group__sign::after {
  content: "";
  position: absolute;
  background: var(--c-green);
  transition: transform .26s var(--ease), opacity .26s var(--ease);
}

.page-faq .faq-group__sign::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .faq-group__sign::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-faq .faq-group[open] .faq-group__sign::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-group__body {
  margin-top: clamp(12px, 1.8vw, 20px);
}

/* 字段/筛选分栏 */
.page-faq .faq-fieldsplit {
  display: grid;
  gap: clamp(18px, 2.8vw, 34px);
  align-items: start;
}

@media (min-width: 900px) {
  .page-faq .faq-fieldsplit {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-faq .faq-fieldsplit--flip {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-faq .faq-fieldsplit--flip .faq-figure {
    order: -1;
  }
}

.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--faq-rule);
  background: var(--c-stand);
  padding: 10px;
  box-shadow: var(--shadow);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: #0E2439;
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  letter-spacing: .03em;
  color: var(--c-mist);
}

/* ---------- 问答 ---------- */
.page-faq .faq-qa {
  display: grid;
}

.page-faq .qa {
  border-top: 1px solid var(--faq-rule);
  padding: clamp(16px, 2.4vw, 26px) 0;
  scroll-margin-top: 104px;
}

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

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

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 0 0 10px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: clamp(15.5px, 1.7vw, 17.5px);
  line-height: 1.6;
  color: var(--c-white);
}

.page-faq .qa__q::before {
  content: "Q";
  flex: none;
  margin-top: 3px;
  padding: 1px 5px;
  border: 1px solid rgba(255, 138, 61, .55);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  color: var(--c-orange);
}

.page-faq .qa__a {
  margin: 0;
  max-width: 72ch;
  color: var(--faq-body);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-faq .qa__link {
  margin: 14px 0 0;
}

.page-faq .qa__link .btn {
  text-decoration: none;
}

@media (max-width: 480px) {
  .page-faq .faq-hero h1 {
    max-width: none;
  }

  .page-faq .qa__q {
    flex-direction: column;
    gap: 6px;
  }

  .page-faq .qa__q::before {
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-topcard,
  .page-faq .faq-jump a,
  .page-faq .faq-index__list a,
  .page-faq .faq-group__sign::before,
  .page-faq .faq-group__sign::after {
    transition: none;
  }
}