/* ===== 赛程知识库 page-faq ===== */

.page-faq .kb-hero {
  padding: clamp(20px, 3.5vw, 36px) 0 clamp(32px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
}

.page-faq .kb-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(20px, 3vw, 34px);
}

@media (min-width: 860px) {
  .page-faq .kb-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: end;
  }
}

.page-faq .kb-hero__intro {
  min-width: 0;
}

.page-faq .kb-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(34px, 5.6vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .kb-hero__lead {
  margin: 18px 0 0;
  max-width: 54ch;
  font-size: clamp(16px, 1.55vw, 18px);
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .kb-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 4vw, 48px);
  margin: 28px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-faq .kb-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .kb-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1;
  color: var(--green);
}

.page-faq .kb-stat__label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .kb-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
  aspect-ratio: 3 / 2;
}

.page-faq .kb-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.06);
}

/* ---------- 检索主体 ---------- */

.page-faq .kb-body {
  padding: clamp(32px, 5vw, 64px) 0;
}

.page-faq .kb-body__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

@media (min-width: 960px) {
  .page-faq .kb-body__grid {
    grid-template-columns: 252px minmax(0, 1fr);
    gap: clamp(36px, 4vw, 64px);
    align-items: start;
  }

  .page-faq .kb-index {
    position: sticky;
    top: 96px;
  }
}

.page-faq .kb-index {
  min-width: 0;
}

.page-faq .kb-index__label {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--muted);
}

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

.page-faq .kb-index__btn {
  position: relative;
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 13px 10px 13px 16px;
  background: transparent;
  border: 0;
  border-top: 1px solid var(--line);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.4;
  text-align: left;
  color: var(--muted);
  cursor: pointer;
  transition: color var(--dur) ease, background-color var(--dur) ease;
}

.page-faq .kb-index__list .kb-index__btn:first-child {
  border-top: 0;
}

.page-faq .kb-index__btn::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  bottom: 9px;
  width: 2px;
  background: var(--green);
  opacity: 0;
  transition: opacity var(--dur) ease;
}

.page-faq .kb-index__btn:hover {
  color: var(--text);
  background: var(--ink-800);
}

.page-faq .kb-index__btn:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: -2px;
}

.page-faq .kb-index__btn.is-active,
.page-faq .kb-index__btn[aria-pressed="true"] {
  color: var(--text);
  background: var(--ink-800);
}

.page-faq .kb-index__btn.is-active::before,
.page-faq .kb-index__btn[aria-pressed="true"]::before {
  opacity: 1;
}

.page-faq .kb-index__num,
.page-faq .kb-index__count {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-faq .kb-index__btn.is-active .kb-index__num,
.page-faq .kb-index__btn[aria-pressed="true"] .kb-index__num {
  color: var(--green);
}

.page-faq .kb-index__hint {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

@media (max-width: 959px) {
  .page-faq .kb-index__list {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 4px;
    border-bottom: 0;
    border-top: 0;
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
  }

  .page-faq .kb-index__btn {
    flex: 0 0 auto;
    width: auto;
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    padding: 9px 14px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    font-size: 14px;
    white-space: nowrap;
  }

  .page-faq .kb-index__btn::before,
  .page-faq .kb-index__num,
  .page-faq .kb-index__count {
    display: none;
  }

  .page-faq .kb-index__btn.is-active,
  .page-faq .kb-index__btn[aria-pressed="true"] {
    border-color: var(--green);
    color: var(--green);
    background: var(--ink-800);
  }
}

/* ---------- 问答列表 ---------- */

.page-faq .kb-list {
  min-width: 0;
  border-top: 1px solid var(--line);
}

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

.page-faq .kb-item[open] {
  background: var(--ink-800);
}

.page-faq .kb-item__q {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 18px;
  align-items: center;
  gap: 8px;
  padding: 16px 6px;
  cursor: pointer;
  list-style: none;
  transition: color var(--dur) ease;
}

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

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

.page-faq .kb-item__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
  transition: color var(--dur) ease;
}

.page-faq .kb-item__text {
  font-size: clamp(16px, 1.5vw, 17px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.page-faq .kb-item__q:hover .kb-item__text {
  color: var(--green);
}

.page-faq .kb-item[open] .kb-item__num {
  color: var(--green);
}

.page-faq .kb-item__mark {
  position: relative;
  width: 14px;
  height: 14px;
  justify-self: end;
}

.page-faq .kb-item__mark::before,
.page-faq .kb-item__mark::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  background: var(--muted);
  transition: transform var(--dur) ease, background-color var(--dur) ease;
}

.page-faq .kb-item__mark::before {
  width: 13px;
  height: 1px;
}

.page-faq .kb-item__mark::after {
  width: 1px;
  height: 13px;
}

.page-faq .kb-item__q:hover .kb-item__mark::before,
.page-faq .kb-item__q:hover .kb-item__mark::after {
  background: var(--green);
}

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

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

.page-faq .kb-item__a {
  padding: 0 24px 20px 48px;
  max-width: 70ch;
}

.page-faq .kb-item__a p {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .kb-link {
  color: var(--green);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--dur) ease;
}

.page-faq .kb-link:hover {
  color: var(--orange);
}

/* ---------- 术语速查 ---------- */

.page-faq .kb-terms {
  padding: clamp(32px, 5vw, 64px) 0;
}

.page-faq .kb-terms__panel {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 48px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-800);
}

.page-faq .kb-terms__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.16;
  pointer-events: none;
  filter: saturate(0.6);
}

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

.page-faq .kb-terms h2 {
  margin: 10px 0 0;
  font-family: var(--font-title);
  font-size: clamp(24px, 3.4vw, 40px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.005em;
  color: var(--text);
}

.page-faq .kb-terms__grid {
  display: grid;
  margin: 26px 0 0;
}

@media (min-width: 760px) {
  .page-faq .kb-terms__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(32px, 4vw, 64px);
  }
}

.page-faq .kb-term {
  display: grid;
  grid-template-columns: minmax(80px, auto) minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.page-faq .kb-term dt {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--green);
}

.page-faq .kb-term dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .kb-terms__note {
  margin: 24px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */

.page-faq .kb-cta {
  padding: clamp(16px, 3vw, 32px) 0 clamp(48px, 7vw, 88px);
}

.page-faq .kb-cta__inner {
  display: grid;
  gap: 24px;
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
  background: var(--ink-800);
}

@media (min-width: 780px) {
  .page-faq .kb-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 40px;
  }
}

.page-faq .kb-cta__copy h2 {
  margin: 0;
  font-family: var(--font-title);
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.15;
  color: var(--text);
}

.page-faq .kb-cta__copy p {
  margin: 12px 0 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}

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

@media (max-width: 479px) {
  .page-faq .kb-item__q {
    grid-template-columns: 28px minmax(0, 1fr) 16px;
    gap: 6px;
    padding: 14px 4px;
  }

  .page-faq .kb-item__a {
    padding: 0 12px 18px 34px;
  }

  .page-faq .kb-cta__actions .btn {
    flex: 1 1 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .kb-index__btn,
  .page-faq .kb-item__q,
  .page-faq .kb-item__num,
  .page-faq .kb-item__mark::before,
  .page-faq .kb-item__mark::after,
  .page-faq .kb-link {
    transition-duration: 0.01ms;
  }
}