.page-faq {
  --faq-toc-w: 268px;
  --faq-gutter: clamp(20px, 3.4vw, 48px);
  --faq-soft: rgba(247, 249, 252, .78);
  --faq-edge: rgba(247, 249, 252, .18);
  background: var(--ice);
  color: var(--ink);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(34px, 7vw, 68px)) 0 clamp(38px, 6vw, 68px);
  color: var(--ice);
  background-color: var(--night);
  background-image:
    radial-gradient(120% 92% at 88% 6%, rgba(30, 123, 255, .32), transparent 58%),
    radial-gradient(96% 84% at 4% 102%, rgba(255, 106, 26, .24), transparent 62%),
    var(--court-lines);
  border-bottom: 2px solid var(--arena);
}

.page-faq .faq-hero .breadcrumb,
.page-faq .faq-hero .breadcrumb__list,
.page-faq .faq-hero .breadcrumb a {
  color: rgba(247, 249, 252, .7);
}

.page-faq .faq-hero .breadcrumb a:hover {
  color: var(--arena);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(22px, 4vw, 40px);
}

.page-faq .faq-hero__lead .index-label {
  color: var(--score);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-cond);
  font-size: clamp(38px, 8vw, 64px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -.02em;
}

.page-faq .faq-hero__lede {
  max-width: 36em;
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--faq-soft);
}

.page-faq .faq-hero__panel {
  padding: 22px 24px 24px;
  background: rgba(42, 28, 18, .62);
  border-left: 2px solid var(--arena);
  clip-path: var(--cut-corner);
}

.page-faq .faq-hero__panel-title {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--arena);
}

.page-faq .faq-hero__links {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-hero__links a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding-bottom: 12px;
  font-size: 15px;
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-edge);
  transition: color .2s var(--ease);
}

.page-faq .faq-hero__links a::before {
  content: "→";
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--arena);
}

.page-faq .faq-hero__links a:hover {
  color: var(--score);
}

.page-faq .faq-hero__note {
  margin: 18px 0 0;
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(247, 249, 252, .62);
}

/* 索引横条 */
.page-faq .faq-jump {
  padding: 16px 0;
  background: var(--data);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-jump__track {
  display: flex;
  gap: 8px;
  padding-bottom: 8px;
  overflow-x: auto;
  scrollbar-color: var(--arena) transparent;
}

.page-faq .faq-jump__track::-webkit-scrollbar {
  height: 4px;
}

.page-faq .faq-jump__track::-webkit-scrollbar-thumb {
  background: var(--arena);
}

.page-faq .faq-jump__link {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  white-space: nowrap;
  text-decoration: none;
}

/* 文档主体与左栏目录 */
.page-faq .faq-body {
  padding: clamp(36px, 6vw, 72px) 0 clamp(48px, 7vw, 88px);
}

.page-faq .faq-body__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .faq-toc {
  display: none;
}

.page-faq .faq-toc__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px dashed var(--line);
}

.page-faq .faq-toc__link {
  position: relative;
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 10px 0 10px 16px;
  font-size: 15px;
  color: var(--muted);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-faq .faq-toc__link::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: transparent;
  transition: background .2s var(--ease);
}

.page-faq .faq-toc__num {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--electric-deep);
}

.page-faq .faq-toc__link:hover {
  color: var(--ink);
}

.page-faq .faq-toc__link[aria-current="true"] {
  color: var(--ink);
  font-weight: 700;
}

.page-faq .faq-toc__link[aria-current="true"]::before {
  background: var(--arena);
}

/* 章节 */
.page-faq .faq-section {
  padding-bottom: clamp(28px, 4.5vw, 48px);
  margin-bottom: clamp(28px, 4.5vw, 52px);
  border-bottom: 1px dashed var(--line);
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-faq .faq-section:last-of-type {
  margin-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-section .section-head__title {
  font-family: var(--font-cond);
  font-size: clamp(23px, 4.4vw, 32px);
  font-weight: 900;
  letter-spacing: -.01em;
  line-height: 1.2;
}

.page-faq .faq-section .section-head__note {
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* 折叠问答 */
.page-faq .faq-items {
  margin-top: 22px;
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-item__q {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 18px 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--electric);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "–";
  color: var(--arena);
}

.page-faq .faq-item__a {
  position: relative;
  padding: 0 0 20px 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-item__a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 2px;
  height: 22px;
  background: transparent;
}

.page-faq .faq-item[open] .faq-item__a::before {
  background: var(--arena);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 40em;
}

.page-faq .faq-item__a a {
  color: var(--electric-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__a a:hover {
  color: var(--arena);
}

/* 总览 */
.page-faq .faq-guide {
  display: grid;
  gap: var(--faq-gutter);
  margin-top: 24px;
}

.page-faq .faq-guide__body > p {
  margin: 0;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-lanes {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-lane {
  padding: 18px 20px 20px 22px;
  background: var(--data);
  border-left: 2px solid var(--arena);
  clip-path: var(--cut-corner);
}

.page-faq .faq-lane__num {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--electric-deep);
}

.page-faq .faq-lane h3 {
  margin: 8px 0 6px;
  font-family: var(--font-cond);
  font-size: 19px;
  font-weight: 900;
  letter-spacing: -.01em;
}

.page-faq .faq-lane p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* 分栏步骤 */
.page-faq .faq-split {
  display: grid;
  gap: var(--faq-gutter);
  margin-top: 24px;
}

.page-faq .faq-steps {
  counter-reset: faqstep;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-steps > li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding-bottom: 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-steps > li::before {
  content: counter(faqstep, decimal-leading-zero);
  padding: 4px 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  text-align: center;
  color: var(--night);
  background: var(--score);
  clip-path: var(--cut-corner-sm);
}

.page-faq .faq-steps--quiet > li {
  grid-template-columns: 42px minmax(0, 1fr);
  max-width: 46em;
}

.page-faq .faq-split__aside {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-faq .faq-combo {
  padding: 18px 20px 20px;
  background: var(--data);
  border-top: 2px solid var(--electric);
  clip-path: var(--cut-corner);
}

.page-faq .faq-combo__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--electric-deep);
}

.page-faq .faq-combo ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-combo li {
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-combo strong {
  color: var(--ink);
}

/* 参数与区域 */
.page-faq .faq-params {
  display: grid;
  gap: 1px;
  margin-top: 24px;
  background: var(--line);
  clip-path: var(--cut-corner);
}

.page-faq .faq-param {
  padding: 18px 20px;
  background: var(--ice);
}

.page-faq .faq-param__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-faq .faq-param__value {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--electric-deep);
}

.page-faq .faq-param__note {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

.page-faq .faq-zones {
  margin: 26px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-zones__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-zones__row dt {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .faq-zones__row dt span {
  display: block;
  margin-bottom: 4px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--arena);
}

.page-faq .faq-zones__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* 深色面板 */
.page-faq .faq-panel {
  margin-top: 22px;
  padding: clamp(20px, 3vw, 28px);
  clip-path: var(--cut-corner);
}

.page-faq .faq-panel--dark {
  color: var(--ice);
  background-color: var(--night);
  background-image: var(--court-lines);
}

.page-faq .faq-tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-faq .faq-tags p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--faq-soft);
}

.page-faq .faq-panel--dark .tag {
  color: var(--ice);
  border-color: var(--faq-edge);
  background: rgba(247, 249, 252, .06);
}

.page-faq .faq-panel--dark .tag--live,
.page-faq .faq-panel--dark .tag--key {
  border-color: transparent;
}

.page-faq .faq-panel--dark .faq-item {
  border-color: var(--faq-edge);
}

.page-faq .faq-panel--dark .faq-item__q {
  color: var(--ice);
}

.page-faq .faq-panel--dark .faq-item__a {
  color: var(--faq-soft);
}

/* 联系方式 */
.page-faq .faq-contact {
  display: grid;
  gap: 18px;
  margin-top: 24px;
}

.page-faq .faq-contact__item {
  padding-top: 14px;
  border-top: 2px solid var(--electric);
}

.page-faq .faq-contact__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-contact__value {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink);
  word-break: break-word;
}

.page-faq .faq-contact__note {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* 反馈条 */
.page-faq .faq-feedback {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  align-items: center;
  margin-top: 30px;
  padding: 22px 24px;
  color: var(--ice);
  background-color: var(--wood);
  background-image: var(--court-lines);
  border-left: 2px solid var(--arena);
  clip-path: var(--cut-corner);
}

.page-faq .faq-feedback__q {
  flex: 1 1 100%;
  margin: 0;
  font-size: 16px;
  font-weight: 700;
}

.page-faq .faq-feedback__label {
  padding: 8px 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--ice);
  border: 1px solid var(--faq-edge);
  clip-path: var(--cut-corner-sm);
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-feedback__label:hover {
  color: var(--arena);
  border-color: var(--arena);
}

.page-faq #faq-helpful-yes:checked ~ .faq-feedback__label[for="faq-helpful-yes"],
.page-faq #faq-helpful-no:checked ~ .faq-feedback__label[for="faq-helpful-no"] {
  color: var(--night);
  background: var(--arena);
  border-color: var(--arena);
}

.page-faq .faq-feedback__msg {
  flex: 1 1 100%;
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--score);
  display: none;
}

.page-faq #faq-helpful-yes:checked ~ .faq-feedback__msg--yes,
.page-faq #faq-helpful-no:checked ~ .faq-feedback__msg--no {
  display: block;
}

/* 图片 */
.page-faq .figure {
  margin: 0;
}

.page-faq .figure__frame {
  overflow: hidden;
  background: var(--data);
}

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

.page-faq .faq-guide__figure .figure__frame {
  aspect-ratio: 3 / 4;
}

.page-faq .faq-split__figure .figure__frame {
  aspect-ratio: 3 / 2;
}

.page-faq .figure__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .figure__cap-index {
  margin-right: 8px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--arena);
}

/* 响应式 */
@media (min-width: 640px) {
  .page-faq .faq-lanes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .faq-params {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-zones__row {
    grid-template-columns: 13em minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-faq .faq-tags {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-faq .faq-contact {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .faq-feedback__q {
    flex: 0 1 auto;
    margin-right: 6px;
  }
}

@media (min-width: 820px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-faq .faq-guide {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body__grid {
    grid-template-columns: var(--faq-toc-w) minmax(0, 1fr);
    gap: var(--faq-gutter);
  }

  .page-faq .faq-toc {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero__links a,
  .page-faq .faq-toc__link,
  .page-faq .faq-toc__link::before,
  .page-faq .faq-feedback__label {
    transition: none;
  }
}