/* =========================================================
   使用指南页面（/guide/）专属样式
   作用域：.page-faq
   ========================================================= */

.page-faq {
  --faq-sticky-top: 0px;
  --faq-block-pad: clamp(40px, 6vw, 76px);
}

@media (max-width: 1023px) {
  .page-faq {
    --faq-sticky-top: var(--topbar-h);
  }
}

/* ---------- 面包屑 ---------- */

.page-faq .breadcrumb {
  padding-top: 26px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding: clamp(26px, 4vw, 48px) 0 clamp(38px, 6vw, 72px);
}

.page-faq .faq-hero__inner {
  max-width: 1000px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.22;
  letter-spacing: 0.01em;
  color: var(--bb-ink);
  margin: 14px 0 20px;
}

.page-faq .faq-hero .lede {
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--bb-ink);
  margin: 0 0 18px;
}

.page-faq .faq-hero__foot {
  margin: 0;
  padding-left: 14px;
  border-left: 3px solid var(--bb-red);
  font-size: 13px;
  line-height: 1.75;
  color: rgba(28, 31, 36, 0.68);
  max-width: 58ch;
}

/* ---------- 年限速览 ---------- */

.page-faq .faq-glance {
  background: var(--bb-indigo);
  color: #ffffff;
  padding: clamp(38px, 6vw, 72px) 0 clamp(32px, 5vw, 56px);
}

.page-faq .faq-glance__title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.35;
  color: #ffffff;
  margin: 0 0 clamp(24px, 4vw, 40px);
}

.page-faq .glance-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-faq .glance-num {
  padding: 22px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
}

.page-faq .glance-num:last-child {
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
}

.page-faq .glance-num__line {
  display: flex;
  align-items: baseline;
  gap: 0.16em;
  margin: 0 0 6px;
  line-height: 0.86;
}

.page-faq .glance-num__value {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(84px, 17vw, 168px);
  letter-spacing: 0.02em;
  color: #ffffff;
}

.page-faq .glance-num--accent .glance-num__value {
  color: var(--bb-orange);
}

.page-faq .glance-num__unit {
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.6vw, 30px);
  color: rgba(255, 255, 255, 0.72);
}

.page-faq .glance-num__label {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(15px, 1.8vw, 19px);
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.9);
}

.page-faq .glance-num__cond {
  margin: 0;
  max-width: 44ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--bb-on-dark-soft);
}

.page-faq .faq-glance__fig {
  margin: clamp(30px, 5vw, 52px) 0 0;
}

.page-faq .faq-glance__fig .figure__cap {
  color: var(--bb-on-dark-soft);
}

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

/* ---------- 分组跳转条 ---------- */

.page-faq .faq-nav {
  position: sticky;
  top: var(--faq-sticky-top);
  z-index: 6;
  background: var(--bb-paper);
  border-bottom: 1px solid var(--bb-gray);
  padding: 12px 0;
}

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

.page-faq .faq-nav__list li {
  flex: 0 0 auto;
}

.page-faq .faq-nav__list a {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--bb-line-strong);
  border-radius: 999px;
  background: #ffffff;
  color: var(--bb-ink);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 160ms ease-out, color 160ms ease-out, background-color 160ms ease-out;
}

.page-faq .faq-nav__list a:hover,
.page-faq .faq-nav__list a:focus-visible {
  border-color: var(--bb-orange);
  color: var(--bb-blue);
  background: rgba(240, 90, 40, 0.07);
}

/* ---------- 问答区块骨架 ---------- */

.page-faq .faq-block {
  padding: var(--faq-block-pad) 0;
  border-bottom: 1px solid var(--bb-line);
}

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

.page-faq .faq-block__idx {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1;
  color: var(--bb-orange);
}

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(23px, 3.2vw, 36px);
  line-height: 1.3;
  color: var(--bb-ink);
}

/* 答案中的高亮字段 */

.page-faq .qa__a mark,
.page-faq .faq-channel__lede mark,
.page-faq .faq-note mark {
  background: var(--bb-yellow);
  color: var(--bb-ink);
  padding: 0 4px;
  border-radius: 3px;
}

/* ---------- 折叠问答 ---------- */

.page-faq .qa {
  border-top: 1px solid var(--bb-gray);
}

.page-faq .qa:last-child {
  border-bottom: 1px solid var(--bb-gray);
}

.page-faq .qa__q {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 18px 42px 18px 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 600;
  letter-spacing: 0.03em;
  line-height: 1.5;
  color: var(--bb-ink);
  transition: color 160ms ease-out;
}

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

.page-faq .qa__q::after {
  content: "";
  position: absolute;
  right: 10px;
  top: 50%;
  width: 11px;
  height: 11px;
  border-right: 2px solid var(--bb-blue);
  border-bottom: 2px solid var(--bb-blue);
  transform: translateY(-72%) rotate(45deg);
  transition: transform 200ms ease-out;
}

.page-faq .qa[open] .qa__q::after {
  transform: translateY(-28%) rotate(-135deg);
}

.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible {
  color: var(--bb-blue);
}

.page-faq .qa__a {
  padding: 2px 0 22px 18px;
  margin-left: 2px;
  border-left: 2px solid var(--bb-red);
  animation: faq-open 200ms ease-out both;
}

.page-faq .qa__a p {
  margin: 0 0 8px;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--bb-ink);
}

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

.page-faq .qa__a strong {
  font-weight: 600;
  color: var(--bb-ink);
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 渠道差异 ---------- */

.page-faq .faq-channel {
  padding: var(--faq-block-pad) 0;
  background: rgba(20, 88, 92, 0.07);
  border-top: 1px solid rgba(20, 88, 92, 0.28);
  border-bottom: 1px solid rgba(20, 88, 92, 0.28);
}

.page-faq .faq-channel .faq-block__idx {
  color: var(--bb-teal);
}

.page-faq .faq-channel__lede {
  margin: 14px 0 30px;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--bb-ink);
}

.page-faq .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-faq .channel-card {
  padding: 20px 0;
  border-top: 1px solid rgba(20, 88, 92, 0.3);
}

.page-faq .channel-card:last-child {
  border-bottom: 1px solid rgba(20, 88, 92, 0.3);
}

.page-faq .channel-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 17px;
  line-height: 1.5;
  color: var(--bb-teal);
}

.page-faq .channel-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--bb-ink);
}

.page-faq .channel-card a {
  color: var(--bb-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 使用与保养 ---------- */

.page-faq .faq-care {
  padding: var(--faq-block-pad) 0;
}

.page-faq .faq-care__lede {
  margin: 14px 0 28px;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--bb-ink);
}

.page-faq .care-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0 44px;
}

.page-faq .care-item {
  padding: 20px 0;
  border-top: 1px dashed var(--bb-line-strong);
}

.page-faq .care-item h3 {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.5;
  color: var(--bb-ink);
}

.page-faq .care-item ol {
  list-style: none;
  counter-reset: care;
  margin: 0;
  padding: 0;
}

.page-faq .care-item li {
  counter-increment: care;
  position: relative;
  padding-left: 30px;
  margin-bottom: 9px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--bb-ink);
}

.page-faq .care-item li:last-child {
  margin-bottom: 0;
}

.page-faq .care-item li::before {
  content: counter(care, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--bb-orange);
}

/* ---------- 受理流程 ---------- */

.page-faq .faq-flow {
  padding: var(--faq-block-pad) 0;
  background: var(--bb-gray);
}

.page-faq .flow-map {
  display: block;
  width: min(100%, 360px);
  height: auto;
  margin: 20px 0 28px;
  color: var(--bb-ink);
}

.page-faq .flow-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

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

.page-faq .flow-step {
  position: relative;
  padding: 16px 18px 22px 0;
  outline: none;
  border-radius: var(--r-md);
  transition: background-color 200ms ease-out;
}

.page-faq .flow-step::after {
  content: "";
  position: absolute;
  left: 15px;
  top: 56px;
  bottom: 4px;
  width: 2px;
  background: repeating-linear-gradient(
    180deg,
    var(--bb-orange) 0 6px,
    transparent 6px 14px
  );
  opacity: 0.7;
}

.page-faq .flow-step:last-child::after {
  display: none;
}

.page-faq .flow-step:hover,
.page-faq .flow-step:focus-visible {
  background: rgba(27, 79, 156, 0.07);
}

.page-faq .flow-step__num {
  display: inline-block;
  margin: 0 0 10px;
  padding: 4px 14px;
  border-radius: 999px;
  background: var(--bb-blue);
  color: #ffffff;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1.6;
}

.page-faq .flow-step:nth-child(1) .flow-step__num { background: var(--bb-orange); }
.page-faq .flow-step:nth-child(2) .flow-step__num { background: var(--bb-blue); }
.page-faq .flow-step:nth-child(3) .flow-step__num { background: var(--bb-teal); }
.page-faq .flow-step:nth-child(4) .flow-step__num { background: var(--bb-wine); }

.page-faq .flow-step h3 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.5;
  color: var(--bb-ink);
}

.page-faq .flow-step p {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--bb-ink);
}

.page-faq .flow-step a {
  color: var(--bb-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .flow-figure {
  margin: 0;
}

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

/* ---------- 未覆盖情形 ---------- */

.page-faq .faq-exclude {
  padding: var(--faq-block-pad) 0;
  border-bottom: 1px solid var(--bb-line);
}

.page-faq .exclude-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-faq .exclude-list li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 16px 0;
  border-top: 1px solid var(--bb-gray);
}

.page-faq .exclude-list li:last-child {
  border-bottom: 1px solid var(--bb-gray);
}

.page-faq .exclude-mark {
  justify-self: start;
  padding: 3px 11px;
  border-radius: 999px;
  background: var(--bb-red);
  color: #ffffff;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  line-height: 1.7;
}

.page-faq .exclude-mark--soft {
  background: transparent;
  color: var(--bb-teal);
  border: 1px solid var(--bb-teal);
}

.page-faq .exclude-list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--bb-ink);
}

.page-faq .faq-note {
  margin: 26px 0 0;
  padding: 16px 18px;
  border-left: 4px solid var(--bb-yellow);
  background: rgba(243, 194, 78, 0.14);
  font-size: 14px;
  line-height: 1.85;
  color: var(--bb-ink);
}

.page-faq .faq-note a {
  color: var(--bb-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 继续核对 ---------- */

.page-faq .faq-next {
  padding: var(--faq-block-pad) 0 clamp(48px, 7vw, 88px);
}

.page-faq .faq-next__title {
  margin: 0 0 24px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.35;
  color: var(--bb-ink);
}

.page-faq .next-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-faq .next-card {
  display: block;
  padding: 22px 0;
  border-top: 1px solid var(--bb-line-strong);
  color: inherit;
  text-decoration: none;
  transition: background-color 200ms ease-out;
}

.page-faq .next-card:last-child {
  border-bottom: 1px solid var(--bb-line-strong);
}

.page-faq .next-card:hover,
.page-faq .next-card:focus-visible {
  background: rgba(27, 79, 156, 0.06);
}

.page-faq .next-card__tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 11px;
  border-radius: 999px;
  border: 1px solid var(--bb-blue);
  color: var(--bb-blue);
  font-family: var(--font-display);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  line-height: 1.7;
}

.page-faq .next-card h3 {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.5;
  color: var(--bb-ink);
}

.page-faq .next-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(28, 31, 36, 0.72);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-glance .glance-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0 40px;
  }

  .page-faq .glance-num {
    padding: 26px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.22);
    border-bottom: none;
  }

  .page-faq .glance-num:last-child {
    border-bottom: none;
  }

  .page-faq .channel-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0 40px;
  }

  .page-faq .channel-card:nth-last-child(-n + 2) {
    border-bottom: 1px solid rgba(20, 88, 92, 0.3);
  }

  .page-faq .exclude-list li {
    grid-template-columns: 118px 1fr;
    align-items: start;
    gap: 14px;
  }

  .page-faq .next-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0 40px;
  }

  .page-faq .next-card:nth-last-child(-n + 2) {
    border-bottom: 1px solid var(--bb-line-strong);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-block__inner {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-faq .care-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .flow-layout {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .flow-figure {
    position: sticky;
    top: calc(var(--faq-sticky-top) + 76px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__a {
    animation: none;
  }

  .page-faq .qa__q::after,
  .page-faq .qa__q,
  .page-faq .flow-step,
  .page-faq .next-card,
  .page-faq .faq-nav__list a {
    transition: none;
  }
}