.page-faq {
  --faq-aside-w: 264px;
  --faq-gap: 64px;
  background: var(--paper-050);
  color: var(--ink-900);
  font-family: var(--font-text);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-900);
  color: var(--on-dark);
  padding: 40px 0 56px;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  right: -12%;
  top: -40%;
  width: 70%;
  height: 180%;
  background: radial-gradient(ellipse at 35% 35%, rgba(224, 138, 23, 0.18), transparent 62%);
  pointer-events: none;
}

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

.page-faq .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--on-dark-dim);
}

.page-faq .breadcrumbs__item a {
  color: var(--on-dark-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-faq .breadcrumbs__item a:hover {
  color: var(--amber-200);
  border-bottom-color: var(--amber-500);
}

.page-faq .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 6px;
  color: var(--on-dark-soft);
}

.page-faq .faq-hero__eyebrow {
  display: block;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber-500);
}

.page-faq .faq-hero__title {
  margin: 0 0 24px;
  font-family: var(--font-display);
  font-size: clamp(34px, 8vw, 64px);
  font-weight: 200;
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--on-dark);
  max-width: 15em;
}

.page-faq .faq-hero__title-thin {
  font-weight: 700;
  color: var(--amber-200);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--on-dark-dim);
}

.page-faq .faq-hero__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--ink-line);
}

.page-faq .faq-hero__meta-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 0 0;
  border-top: 2px solid transparent;
}

.page-faq .faq-hero__meta-item:first-child {
  border-top-color: var(--amber-500);
}

.page-faq .faq-hero__meta-num {
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  color: var(--on-dark);
}

.page-faq .faq-hero__meta-item:first-child .faq-hero__meta-num {
  color: var(--amber-500);
}

.page-faq .faq-hero__meta-label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--on-dark-soft);
}

/* ---------- 四象限索引图 ---------- */

.page-faq .faq-overview {
  padding: 40px 0 8px;
}

.page-faq .faq-overview__fig {
  margin: 0;
  background: var(--ink-700);
}

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

.page-faq .faq-overview__note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-600);
  max-width: 46em;
}

/* ---------- 主体布局 ---------- */

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding: 40px 0 64px;
}

/* ---------- 侧栏 ---------- */

.page-faq .faq-aside__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--slate-600);
}

.page-faq .faq-nav {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-300);
}

.page-faq .faq-nav__link {
  display: grid;
  grid-template-columns: 24px 1fr auto;
  align-items: baseline;
  gap: 10px;
  padding: 13px 8px 13px 14px;
  border-bottom: 1px solid var(--line-300);
  border-left: 2px solid transparent;
  color: var(--ink-700);
  text-decoration: none;
  font-size: 15px;
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  border-left-color: var(--amber-500);
  color: var(--ink-950);
}

.page-faq .faq-nav__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--blue-500);
}

.page-faq .faq-nav__text {
  font-weight: 500;
}

.page-faq .faq-nav__count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate-600);
}

.page-faq .faq-search {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--ink-950);
}

.page-faq .faq-search__label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--slate-600);
}

.page-faq .faq-search__input {
  display: block;
  width: 100%;
  padding: 8px 2px;
  border: 0;
  border-bottom: 1px solid var(--blue-500);
  border-radius: 0;
  background: transparent;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-950);
  outline: none;
  transition: border-color var(--dur-fast) var(--ease);
}

.page-faq .faq-search__input::placeholder {
  color: var(--slate-600);
  opacity: 0.75;
}

.page-faq .faq-search__input:focus {
  border-bottom-color: var(--celadon-600);
}

.page-faq .faq-search__hint {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.65;
  color: var(--slate-600);
}

/* ---------- 问答分组 ---------- */

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

.page-faq .faq-group {
  scroll-margin-top: 24px;
  margin-bottom: 56px;
}

.page-faq .faq-group:last-of-type {
  margin-bottom: 40px;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 2px solid var(--ink-950);
  margin-bottom: 2px;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--amber-500);
  padding-top: 8px;
}

.page-faq .faq-group__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(24px, 5.4vw, 34px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--ink-950);
}

.page-faq .faq-group__lead {
  margin: 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate-600);
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-item {
  border-bottom: 1px solid var(--line-300);
}

.page-faq .faq-item__q {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 0 18px 18px;
  cursor: pointer;
  list-style: none;
  background: var(--white-000);
  transition: background var(--dur-fast) var(--ease);
}

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

.page-faq .faq-item__q::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: var(--line-300);
  transition: background var(--dur-fast) var(--ease), top var(--dur-fast) var(--ease), bottom var(--dur-fast) var(--ease);
}

.page-faq .faq-item[open] > .faq-item__q::before {
  top: 6px;
  bottom: 6px;
  background: var(--amber-500);
}

.page-faq .faq-item__q:hover {
  background: var(--paper-050);
}

.page-faq .faq-item__text {
  font-size: 16px;
  line-height: 1.55;
  font-weight: 500;
  color: var(--ink-900);
  transition: font-weight var(--dur-fast) var(--ease);
}

.page-faq .faq-item[open] > .faq-item__q .faq-item__text {
  font-weight: 700;
  color: var(--ink-950);
}

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 14px;
  width: 14px;
  height: 14px;
  margin-left: auto;
  margin-top: 4px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--blue-500);
  transition: transform var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}

.page-faq .faq-item__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1px;
}

.page-faq .faq-item__mark::after {
  left: 6px;
  top: 0;
  width: 1px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-item__mark::before {
  background: var(--amber-500);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: scaleY(0);
}

.page-faq .faq-item__a {
  padding: 0 8px 22px 18px;
  background: var(--white-000);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--slate-600);
}

/* ---------- 三步自查 ---------- */

.page-faq .faq-check {
  scroll-margin-top: 24px;
  margin-bottom: 56px;
  padding-top: 8px;
}

.page-faq .faq-check__head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 2px solid var(--ink-950);
}

.page-faq .faq-check__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--celadon-600);
  padding-top: 8px;
}

.page-faq .faq-check__title {
  margin: 0;
  grid-column: 2;
  font-family: var(--font-display);
  font-size: clamp(24px, 5.4vw, 34px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--ink-950);
}

.page-faq .faq-check__lead {
  margin: 10px 0 0;
  grid-column: 2;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate-600);
}

.page-faq .faq-check__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 28px;
}

.page-faq .faq-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: faq-step;
}

.page-faq .faq-step {
  position: relative;
  padding: 22px 0 22px 62px;
  border-top: 1px solid var(--line-300);
}

.page-faq .faq-step:last-child {
  border-bottom: 1px solid var(--line-300);
}

.page-faq .faq-step__num {
  position: absolute;
  left: 0;
  top: 22px;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--ink-900);
  color: var(--on-dark);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.page-faq .faq-step:nth-child(2) .faq-step__num {
  background: var(--ink-700);
}

.page-faq .faq-step:nth-child(3) .faq-step__num {
  background: var(--celadon-600);
}

.page-faq .faq-step__title {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink-950);
}

.page-faq .faq-step__text {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--slate-600);
}

.page-faq .faq-check__fig {
  margin: 0;
  background: var(--ink-700);
}

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

/* ---------- 仍需帮助 ---------- */

.page-faq .faq-help {
  position: relative;
  overflow: hidden;
  padding: 36px 28px 40px;
  background: var(--ink-950);
  color: var(--on-dark);
}

.page-faq .faq-help::after {
  content: "";
  position: absolute;
  left: -10%;
  bottom: -60%;
  width: 60%;
  height: 140%;
  background: radial-gradient(ellipse at 50% 50%, rgba(31, 127, 107, 0.22), transparent 64%);
  pointer-events: none;
}

.page-faq .faq-help > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-help__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(22px, 5vw, 30px);
  font-weight: 200;
  line-height: 1.2;
  color: var(--on-dark);
}

.page-faq .faq-help__text {
  margin: 0 0 24px;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--on-dark-dim);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.page-faq .faq-help__checklist {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 0;
  padding: 22px 0 0;
  list-style: none;
  border-top: 1px solid var(--ink-line);
}

.page-faq .faq-help__checklist li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--on-dark-dim);
}

.page-faq .faq-help__checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 7px;
  background: var(--celadon-600);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-hero__meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-help {
    padding: 48px 44px 52px;
  }

  .page-faq .faq-help__checklist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding: 56px 0 72px;
  }

  .page-faq .faq-overview {
    padding: 56px 0 12px;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-aside-w) minmax(0, 1fr);
    gap: var(--faq-gap);
    padding: 56px 0 88px;
  }

  .page-faq .faq-aside {
    position: sticky;
    top: 24px;
    align-self: start;
  }

  .page-faq .faq-check__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-check__fig {
    margin-top: 22px;
  }

  .page-faq .faq-group__head {
    grid-template-columns: 40px 1fr;
    gap: 20px;
  }

  .page-faq .faq-check__head {
    grid-template-columns: 40px 1fr;
    gap: 20px;
  }

  .page-faq .faq-item__q {
    padding: 20px 0 20px 22px;
  }

  .page-faq .faq-item__a {
    padding: 0 8px 24px 22px;
  }

  .page-faq .faq-help {
    padding: 56px 56px 60px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-nav__link,
  .page-faq .faq-item__q,
  .page-faq .faq-item__q::before,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-search__input {
    transition: none;
  }
}
</main>