.page-faq {
  --faq-rail-w: 250px;
  --faq-line: 1px solid var(--line);
  background: var(--ink);
  color: var(--body-copy);
}

.page-faq .breadcrumb {
  padding: 22px 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .breadcrumb-link {
  color: var(--mist);
  text-decoration: none;
}

.page-faq .breadcrumb-link:hover,
.page-faq .breadcrumb-link:focus-visible {
  color: var(--cyan);
}

.page-faq .breadcrumb-current {
  color: var(--chalk);
}

.page-faq .crumb-sep {
  margin: 0 6px;
  color: var(--line);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  display: grid;
  gap: 24px;
  padding: 18px 0 34px;
  border-bottom: 2px solid var(--pitch);
}

.page-faq .faq-hero .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 16px;
  font-size: clamp(26px, 7vw, 44px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: .01em;
  color: var(--chalk);
}

.page-faq .faq-hero .lead {
  max-width: 48ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--body-copy);
}

.page-faq .faq-hero__meta {
  list-style: none;
  margin: 24px 0 0;
  padding: 16px 0 0;
  display: grid;
  gap: 10px;
  border-top: var(--faq-line);
}

.page-faq .faq-hero__meta li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--chalk);
  word-break: break-all;
}

.page-faq .faq-hero__meta .mono {
  flex: none;
  font-size: 10px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-faq .faq-hero__media {
  position: relative;
  margin: 0;
}

.page-faq .faq-hero__tag {
  position: absolute;
  z-index: 2;
  top: 12px;
  left: 12px;
  padding: 4px 8px;
  background: var(--signal);
  color: var(--ink);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .16em;
}

.page-faq .img-frame__inner {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--grid);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.7) brightness(.68);
}

.page-faq .img-cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--mist);
}

/* ---------- 分类入口带 ---------- */

.page-faq .faq-quick {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  margin: 28px 0 0;
  background: var(--line);
  border: 2px solid var(--line);
}

.page-faq .faq-quick__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 14px;
  background: var(--ink-2);
  color: var(--chalk);
  text-decoration: none;
  transition: background .16s var(--ease), color .16s var(--ease);
}

.page-faq .faq-quick__item:hover,
.page-faq .faq-quick__item:focus-visible {
  background: var(--pitch);
}

.page-faq .faq-quick__item:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -4px;
}

.page-faq .faq-quick__num {
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-faq .faq-quick__label {
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-layout {
  margin-top: 40px;
}

.page-faq .faq-rail {
  border: 2px solid var(--line);
  background: var(--ink-2);
  padding: 16px;
  margin-bottom: 30px;
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--mist);
}

.page-faq .toc-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 10px 11px 14px;
  border-top: 1px solid var(--grid);
  font-size: 14px;
  color: var(--mist);
  text-decoration: none;
  transition: color .16s var(--ease), background .16s var(--ease);
}

.page-faq .faq-rail nav > .toc-link:first-child {
  border-top: 0;
}

.page-faq .toc-link .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-faq .toc-link:hover,
.page-faq .toc-link:focus-visible {
  color: var(--chalk);
  background: var(--pitch);
}

.page-faq .toc-link[aria-current="true"] {
  color: var(--chalk);
  background: var(--pitch);
  font-weight: 700;
}

.page-faq .toc-link[aria-current="true"]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background: var(--cyan);
}

/* ---------- 内容区块 ---------- */

.page-faq .faq-block {
  padding-bottom: 42px;
  scroll-margin-top: 96px;
}

.page-faq .faq-block + .faq-block {
  border-top: 1px solid var(--grid);
  padding-top: 34px;
}

.page-faq .faq-block__head {
  margin-bottom: 20px;
}

.page-faq .faq-block__head .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-faq .faq-block__head h2 {
  margin: 10px 0 0;
  font-size: clamp(21px, 4.6vw, 31px);
  line-height: 1.24;
  font-weight: 900;
  color: var(--chalk);
}

.page-faq .faq-block__intro {
  max-width: 62ch;
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-item {
  border: 2px solid var(--line);
  background: var(--ink-2);
  box-shadow: var(--shadow-soft);
  margin-bottom: 14px;
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-faq .faq-item[open] {
  border-color: var(--cyan);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-item > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 16px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--chalk);
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary::marker {
  content: "";
}

.page-faq .faq-item > summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-item[open] > summary::after {
  content: "–";
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}

.page-faq .faq-q-num {
  flex: none;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-faq .faq-item__body {
  padding: 16px 16px 20px;
  border-top: 1px solid var(--grid);
  font-size: 15px;
  line-height: 1.75;
}

.page-faq .faq-item__body p {
  margin: 0 0 12px;
  max-width: 62ch;
}

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

.page-faq .faq-key {
  display: block;
  margin-bottom: 14px;
  padding-left: 12px;
  border-left: 3px solid var(--cyan);
  color: var(--chalk);
  font-weight: 700;
  line-height: 1.65;
}

/* ---------- 步骤清单 ---------- */

.page-faq .faq-steps {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
}

.page-faq .faq-steps li {
  position: relative;
  margin-left: 11px;
  padding: 0 0 16px 34px;
  border-left: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.7;
}

.page-faq .faq-steps li:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-faq .faq-steps li::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: -11px;
  top: 0;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--signal);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
}

.page-faq .faq-steps {
  counter-reset: step;
}

.page-faq .faq-note {
  margin-top: 16px;
  padding: 12px 14px;
  border: 1px dashed var(--line);
  background: rgba(44, 107, 91, .14);
  font-size: 14px;
  line-height: 1.7;
  color: var(--body-copy);
}

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

.page-faq .faq-inline-link:hover,
.page-faq .faq-inline-link:focus-visible {
  color: var(--cyan-soft);
}

/* ---------- 旧资料图文 ---------- */

.page-faq .faq-archive {
  display: grid;
  gap: 22px;
}

.page-faq .faq-archive__media {
  margin: 0;
}

.page-faq .faq-archive__media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.65) brightness(.75);
}

.page-faq .faq-archive__body p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.75;
  max-width: 62ch;
}

/* ---------- 联系方式 ---------- */

.page-faq .faq-contact {
  display: grid;
  gap: 20px;
}

.page-faq .faq-contact__cards {
  display: grid;
  gap: 16px;
}

.page-faq .faq-contact__card {
  border: 2px solid var(--line);
  background: var(--ink-2);
  padding: 18px;
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-contact__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-faq .faq-contact__value {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .03em;
  color: var(--chalk);
  word-break: break-all;
}

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

/* ---------- 提交清单 ---------- */

.page-faq .faq-checklist {
  border: 2px solid var(--line);
  background: var(--ink-2);
  padding: 18px;
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-checklist .panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-checklist .panel-title {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--chalk);
}

.page-faq .faq-checklist .panel-index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  color: var(--mist);
}

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

.page-faq .faq-check {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 2px 0;
  background: transparent;
  border: 0;
  font: inherit;
  font-size: 14px;
  line-height: 1.6;
  text-align: left;
  color: var(--body-copy);
  cursor: pointer;
}

.page-faq .faq-check__box {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  border: 2px solid var(--line);
  background: var(--ink);
  transition: background .16s var(--ease), border-color .16s var(--ease);
}

.page-faq .faq-check[aria-pressed="true"] .faq-check__box {
  border-color: var(--signal);
  background: var(--signal);
}

.page-faq .faq-check[aria-pressed="true"] .faq-check__box::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 1px;
  width: 4px;
  height: 8px;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  transform: rotate(42deg);
}

.page-faq .faq-check:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-faq .faq-checklist__hint {
  margin: 16px 0 0;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
}

/* ---------- 已知问题 ---------- */

.page-faq .faq-known {
  border: 2px solid var(--line);
  background: var(--ink-2);
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-known__row {
  display: grid;
  gap: 6px;
  padding: 15px 16px;
  border-top: 1px solid var(--grid);
}

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

.page-faq .faq-known__id {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-faq .faq-known__issue {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--chalk);
}

.page-faq .faq-known__fix {
  font-size: 14px;
  line-height: 1.65;
  color: var(--body-copy);
}

/* ---------- 响应式 ---------- */

@media (min-width: 560px) {
  .page-faq .faq-contact__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-contact__note {
    grid-column: 1 / -1;
  }
}

@media (min-width: 720px) {
  .page-faq .faq-quick {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
  .page-faq .faq-hero__meta {
    grid-template-columns: repeat(3, auto);
    justify-content: start;
    gap: 26px;
  }
  .page-faq .toc-rail {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 16px;
  }
  .page-faq .toc-rail > .faq-rail__title {
    grid-column: 1 / -1;
  }
  .page-faq .toc-rail > nav {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 16px;
  }
  .page-faq .faq-rail nav > .toc-link:nth-child(-n + 3) {
    border-top: 0;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-archive {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    gap: 30px;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: center;
    gap: 44px;
    padding: 34px 0 46px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    display: grid;
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
    margin-top: 48px;
  }
  .page-faq .faq-rail {
    position: sticky;
    top: 92px;
    margin-bottom: 0;
    display: block;
  }
  .page-faq .toc-rail > nav {
    display: block;
  }
  .page-faq .faq-rail nav > .toc-link:nth-child(-n + 3) {
    border-top: 1px solid var(--grid);
  }
  .page-faq .faq-rail nav > .toc-link:first-child {
    border-top: 0;
  }
  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: 26px;
    align-items: start;
  }
  .page-faq .faq-known__row {
    grid-template-columns: 108px minmax(0, 1fr) minmax(0, .9fr);
    align-items: baseline;
    gap: 22px;
    padding: 17px 18px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero h1 {
    font-size: 46px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .toc-link,
  .page-faq .faq-quick__item,
  .page-faq .faq-check__box {
    transition: none;
  }
}