/* ===== 看台知识库 · 页面专属样式（作用域 .page-faq） ===== */

.page-faq {
  padding-bottom: 72px;
}

/* ---------- 面包屑与首屏 ---------- */

.page-faq .breadcrumb {
  margin: 22px 0 18px;
}

.page-faq .kb-hero {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px 22px 28px;
  background:
    radial-gradient(130% 150% at 92% -20%, rgba(255, 106, 43, 0.22), transparent 60%),
    linear-gradient(158deg, var(--panel-deep) 0%, var(--deep-pitch) 58%, var(--night-stand) 100%);
}

.page-faq .kb-hero::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle at 34% 34%, rgba(200, 255, 77, 0.17), transparent 70%);
  pointer-events: none;
}

.page-faq .kb-hero h1 {
  position: relative;
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(42px, 13vw, 84px);
  line-height: 0.96;
  letter-spacing: -0.015em;
  color: var(--mist);
}

.page-faq .kb-hero__lede {
  position: relative;
  margin: 16px 0 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(232, 237, 233, 0.84);
}

.page-faq .kb-hero__facts {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 24px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-faq .kb-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--neutral-gray);
}

.page-faq .kb-hero__facts .num {
  font-family: var(--font-numeric);
  font-size: 24px;
  font-weight: 600;
  line-height: 1;
  color: var(--data-amber);
}

/* ---------- 索引 + 正文 双栏外壳 ---------- */

.page-faq .kb-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 40px;
}

/* ---------- 左侧分类索引 ---------- */

.page-faq .kb-index__title {
  margin: 0 0 10px;
  color: var(--steel-blue);
}

.page-faq .kb-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 2px 0 10px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .kb-index__list::-webkit-scrollbar {
  display: none;
}

.page-faq .kb-index__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(16, 58, 49, 0.72);
  color: var(--mist);
  font-size: 14px;
  line-height: 1.2;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease), color 0.22s var(--ease);
}

.page-faq .kb-index__link:hover,
.page-faq .kb-index__link:focus-visible {
  border-color: var(--data-amber);
  background: rgba(245, 165, 36, 0.13);
  color: var(--data-amber);
}

.page-faq .kb-index__no {
  font-family: var(--font-numeric);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--steel-blue);
}

.page-faq .kb-index__link:hover .kb-index__no,
.page-faq .kb-index__link:focus-visible .kb-index__no {
  color: var(--signal-orange);
}

.page-faq .kb-index__note {
  display: none;
  margin-top: 20px;
  padding: 18px 18px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: var(--panel-deep);
}

.page-faq .kb-index__note p {
  margin: 0 0 14px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--neutral-gray);
}

/* ---------- 搜索过滤 ---------- */

.page-faq .kb-search {
  margin-bottom: 26px;
}

.page-faq .kb-search__input {
  box-sizing: border-box;
  width: 100%;
  padding: 14px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--panel-deep);
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
}

.page-faq .kb-search__input::placeholder {
  color: var(--steel-blue);
  opacity: 0.72;
}

.page-faq .kb-search__input:focus-visible {
  outline: 2px solid var(--data-amber);
  outline-offset: 2px;
}

.page-faq .kb-search__hint {
  margin: 10px 2px 0;
  font-family: var(--font-numeric);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--steel-blue);
}

/* ---------- 问答分组 ---------- */

.page-faq .kb-group {
  scroll-margin-top: 96px;
  padding: 30px 0 4px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .kb-group:first-of-type {
  border-top: 0;
  padding-top: 4px;
}

.page-faq .kb-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 14px;
}

.page-faq .kb-group__no {
  font-family: var(--font-numeric);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--signal-orange);
}

.page-faq .kb-group__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(24px, 7vw, 36px);
  line-height: 1.12;
  letter-spacing: -0.005em;
  color: var(--mist);
}

/* ---------- 手风琴条目 ---------- */

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

.page-faq .acc__head {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .acc__btn {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  box-sizing: border-box;
  width: 100%;
  padding: 18px 0;
  border: 0;
  background: none;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.65;
  text-align: left;
  cursor: pointer;
}

.page-faq .acc__btn:focus-visible {
  outline: 2px solid var(--data-amber);
  outline-offset: -2px;
  border-radius: var(--radius-sm);
}

.page-faq .kb-plus {
  position: relative;
  flex: 0 0 auto;
  margin-left: auto;
  width: 24px;
  height: 24px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  transition: transform 0.28s var(--ease), border-color 0.28s var(--ease);
}

.page-faq .kb-plus::before,
.page-faq .kb-plus::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 1.5px;
  background: var(--signal-orange);
  transform: translate(-50%, -50%);
}

.page-faq .kb-plus::after {
  transform: translate(-50%, -50%) rotate(90deg);
  transition: opacity 0.28s var(--ease);
}

.page-faq .acc__btn[aria-expanded="true"] .kb-plus,
.page-faq .acc__item.is-active .kb-plus,
.page-faq .acc__item.is-on .kb-plus,
.page-faq .acc__item.is-open .kb-plus {
  transform: rotate(180deg);
  border-color: var(--signal-orange);
}

.page-faq .acc__btn[aria-expanded="true"] .kb-plus::after,
.page-faq .acc__item.is-active .kb-plus::after,
.page-faq .acc__item.is-on .kb-plus::after,
.page-faq .acc__item.is-open .kb-plus::after {
  opacity: 0;
}

.page-faq .acc__panel-inner {
  margin: 0 0 18px 12px;
  padding: 2px 0 2px 18px;
  border-left: 2px solid rgba(245, 165, 36, 0.34);
}

.page-faq .acc__panel-inner p {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(232, 237, 233, 0.82);
}

/* ---------- 章节配图 ---------- */

.page-faq .kb-figure {
  margin: 22px 0 8px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--night-stand);
}

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

.page-faq .kb-figure--square img {
  aspect-ratio: 1 / 1;
}

.page-faq .kb-figure figcaption {
  padding: 12px 16px 14px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--steel-blue);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 底部两张接续卡 ---------- */

.page-faq .kb-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 44px;
}

.page-faq .kb-next__card {
  display: block;
  padding: 24px 22px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(152deg, var(--panel-deep), var(--deep-pitch));
  color: var(--mist);
  text-decoration: none;
  transition: border-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-faq .kb-next__card--accent {
  border-color: rgba(255, 106, 43, 0.42);
  background: linear-gradient(152deg, rgba(255, 106, 43, 0.16), var(--deep-pitch) 72%);
}

.page-faq .kb-next__card:hover,
.page-faq .kb-next__card:focus-visible {
  border-color: var(--signal-orange);
  transform: translateY(-3px);
}

.page-faq .kb-next__card .label {
  margin: 0 0 8px;
  color: var(--steel-blue);
}

.page-faq .kb-next__card h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 22px;
  line-height: 1.2;
  color: var(--mist);
}

.page-faq .kb-next__card p {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(232, 237, 233, 0.76);
}

.page-faq .kb-next__go {
  font-family: var(--font-numeric);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--data-amber);
}

/* ---------- 平板 ---------- */

@media (min-width: 768px) {
  .page-faq {
    padding-bottom: 96px;
  }

  .page-faq .kb-hero {
    padding: 44px 40px 38px;
  }

  .page-faq .kb-hero__lede {
    font-size: 17px;
  }

  .page-faq .kb-next {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .kb-group {
    padding-top: 36px;
  }

  .page-faq .acc__btn {
    font-size: 17px;
    padding: 20px 0;
  }

  .page-faq .kb-figure--square img {
    aspect-ratio: 16 / 10;
  }
}

/* ---------- 桌面：左侧固定索引 + 右侧宽幅问答 ---------- */

@media (min-width: 1024px) {
  .page-faq .kb-shell {
    grid-template-columns: 254px minmax(0, 1fr);
    gap: 56px;
    margin-top: 52px;
  }

  .page-faq .kb-index {
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-faq .kb-index__title {
    margin-bottom: 14px;
  }

  .page-faq .kb-index__list {
    flex-direction: column;
    gap: 6px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-faq .kb-index__link {
    display: flex;
    width: 100%;
    box-sizing: border-box;
    padding: 11px 16px;
    font-size: 14px;
  }

  .page-faq .kb-index__note {
    display: block;
  }

  .page-faq .kb-search__input {
    max-width: 520px;
  }

  .page-faq .acc__panel-inner {
    margin-left: 20px;
    padding-left: 22px;
  }
}

@media (min-width: 1440px) {
  .page-faq .kb-shell {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 72px;
  }

  .page-faq .kb-group__head h2 {
    font-size: 38px;
  }

  .page-faq .kb-hero__facts .num {
    font-size: 26px;
  }
}

/* ---------- 减少动态 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq .kb-index__link,
  .page-faq .kb-plus,
  .page-faq .kb-plus::after,
  .page-faq .kb-next__card {
    transition: none;
  }

  .page-faq .kb-next__card:hover,
  .page-faq .kb-next__card:focus-visible {
    transform: none;
  }
}