.page-faq {
  --faq-rail: 196px;
  --faq-gap: clamp(20px, 3.4vw, 44px);
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  background:
    repeating-linear-gradient(118deg, rgba(0, 102, 255, 0.045) 0 2px, transparent 2px 24px),
    linear-gradient(162deg, rgba(77, 148, 255, 0.16), rgba(255, 107, 53, 0.07) 52%, rgba(248, 249, 250, 0) 82%);
  border-bottom: var(--brutal) solid var(--ink);
}

.page-faq .faq-hero__inner {
  padding-top: clamp(26px, 4.5vw, 52px);
  padding-bottom: clamp(30px, 5vw, 56px);
}

.page-faq .faq-hero__kicker {
  margin: clamp(18px, 3vw, 34px) 0 0;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--orange);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 20ch;
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.015em;
}

.page-faq .faq-hero__lead {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 40ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--muted-strong);
}

.page-faq .faq-hero__lead strong {
  color: var(--ink);
  font-weight: 800;
}

.page-faq .faq-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__band {
  height: clamp(140px, 24vw, 300px);
  overflow: hidden;
  border-top: var(--brutal) solid var(--ink);
}

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

/* ---------- 双栏骨架 ---------- */

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding-top: clamp(30px, 5vw, 64px);
  padding-bottom: clamp(40px, 6vw, 88px);
}

/* ---------- 左侧问题索引 ---------- */

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

.page-faq .faq-index__label {
  margin: 0 0 10px;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__list > li {
  flex: none;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 2px solid var(--cloud);
  background: #fff;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 700;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--blue);
  box-shadow: var(--shadow-sm);
  transform: translate(-1px, -1px);
}

.page-faq .faq-index__num {
  font-variant-numeric: tabular-nums;
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--orange);
}

/* ---------- 右侧答案流 ---------- */

.page-faq .faq-stream {
  min-width: 0;
}

.page-faq .faq-block {
  padding: clamp(30px, 4.6vw, 56px) 0;
  border-top: var(--brutal) solid var(--ink);
}

.page-faq .faq-stream > .faq-block:first-child {
  border-top-width: var(--brutal);
}

.page-faq .faq-block__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-faq .faq-block__num {
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.24em;
  font-variant-numeric: tabular-nums;
  color: var(--orange);
}

.page-faq .faq-block__head h2 {
  margin: 0;
  max-width: 22ch;
  font-weight: 900;
  line-height: 1.16;
}

.page-faq .faq-block__intro {
  margin: 0;
  max-width: 46ch;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--muted-strong);
}

.page-faq .faq-block__body {
  display: grid;
  gap: clamp(22px, 3.6vw, 40px);
  align-items: start;
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-block__qa {
  min-width: 0;
}

.page-faq .faq-item {
  border: var(--brutal) solid var(--ink);
  background: #fff;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.22s ease, transform 0.22s ease;
}

.page-faq .faq-item + .faq-item {
  margin-top: 14px;
}

.page-faq .faq-item[open] {
  box-shadow: var(--shadow-md);
}

.page-faq .faq-item__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  box-shadow: inset 0 0 0 0 var(--blue);
  transition: box-shadow 0.24s ease, padding 0.24s ease;
}

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

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

.page-faq .faq-item__head:hover {
  background: rgba(0, 102, 255, 0.05);
}

.page-faq .faq-item[open] > .faq-item__head {
  box-shadow: inset 4px 0 0 var(--blue);
  padding-left: 22px;
}

.page-faq .faq-item__q {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
}

.page-faq .faq-item__mark {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 4px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--blue);
  transition: transform 0.2s ease, background 0.2s ease;
}

.page-faq .faq-item__mark::before {
  left: 0;
  top: 8px;
  width: 18px;
  height: 3px;
}

.page-faq .faq-item__mark::after {
  left: 8px;
  top: 0;
  width: 3px;
  height: 18px;
}

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

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

.page-faq .faq-item__a {
  margin: 0 18px;
  padding: 14px 0 20px;
  border-top: 1px solid var(--cloud);
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--muted-strong);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 60ch;
}

.page-faq .faq-item__a a {
  color: var(--blue-deep);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__a .num {
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  color: var(--ink);
}

/* ---------- 保修章节配图 ---------- */

.page-faq .faq-block__figure {
  margin: 0;
  max-width: 420px;
}

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

.page-faq .faq-block__figure .media__caption {
  margin-top: 10px;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 联系引导 ---------- */

.page-faq .faq-block--help {
  padding-bottom: clamp(34px, 5vw, 64px);
}

.page-faq .faq-help {
  display: grid;
  gap: clamp(18px, 3vw, 26px);
  padding: clamp(22px, 3.4vw, 36px);
  align-items: start;
}

.page-faq .faq-help__label {
  margin: 0 0 6px;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--orange-soft);
}

.page-faq .faq-help__value {
  margin: 0;
  font-size: clamp(1.1rem, 2.4vw, 1.4rem);
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-help__value.num {
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-help__note {
  margin: 10px 0 0;
  font-size: 0.85rem;
  line-height: 1.7;
  color: rgba(248, 249, 250, 0.72);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 中屏 ---------- */

@media (min-width: 760px) {
  .page-faq .faq-help {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-help__actions {
    grid-column: 1 / -1;
  }

  .page-faq .faq-block--with-figure .faq-block__body {
    grid-template-columns: minmax(0, 1fr) minmax(230px, 300px);
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 980px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 76px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__link {
    justify-content: flex-start;
    padding: 11px 14px 11px 12px;
    border-width: 0;
    border-left: 3px solid var(--cloud);
    background: transparent;
    font-size: 0.92rem;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--blue);
    box-shadow: none;
    transform: none;
    background: rgba(0, 102, 255, 0.06);
  }

  .page-faq .faq-index__list > li:first-child .faq-index__link {
    border-left-color: var(--orange);
  }

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

/* ---------- 宽屏 ---------- */

@media (min-width: 1180px) {
  .page-faq .faq-block--with-figure .faq-block__body {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 340px);
  }

  .page-faq .faq-item__head {
    padding: 18px 22px;
  }

  .page-faq .faq-item[open] > .faq-item__head {
    padding-left: 26px;
  }

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

/* ---------- 减少动效偏好 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__head,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-index__link {
    transition: none;
  }
}