.page-faq {
  --faq-rail: 268px;
  --faq-ink-soft: #5a4b3c;
  --faq-focus: #0a3d5e;
  background: var(--sand);
  color: var(--ink);
}

/* ---------- 面包屑 ---------- */
.page-faq .crumbs {
  margin: 0;
  padding-top: clamp(14px, 2vw, 22px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(20px, 3vw, 38px) 0 clamp(30px, 5vw, 58px);
  border-bottom: 2px solid var(--ink);
  background:
    linear-gradient(180deg, rgba(15, 92, 140, 0.07), rgba(243, 233, 214, 0) 68%),
    var(--sand);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -32%;
  right: -14%;
  width: min(62%, 720px);
  height: 168%;
  background: linear-gradient(168deg, var(--lake) 0 54%, var(--sunset) 54% 72%, var(--sunset-soft) 72% 100%);
  clip-path: polygon(26% 0, 100% 0, 100% 100%, 0 100%);
  opacity: 0.15;
  transform: rotate(-4deg);
  z-index: 0;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 40px);
  align-items: end;
}

.page-faq .faq-hero__lead {
  max-width: 44ch;
}

.page-faq .faq-hero .eyebrow {
  margin: 0;
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(34px, 5.6vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 40ch;
  font-size: clamp(17px, 1.6vw, 19px);
  line-height: 1.78;
  color: var(--faq-ink-soft);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 18px;
  margin: 0;
  padding: 18px;
  background: var(--cream);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--lake);
  border-radius: var(--radius);
  box-shadow: var(--shadow-paper);
}

.page-faq .faq-stat dt {
  margin: 0 0 4px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--faq-ink-soft);
}

.page-faq .faq-stat dd {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(19px, 2.1vw, 25px);
  line-height: 1.15;
  color: var(--lake-deep);
}

.page-faq .faq-stat .num {
  color: var(--sunset);
  font-size: 1.12em;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  padding: clamp(30px, 5vw, 64px) 0 clamp(36px, 5vw, 74px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 48px);
  align-items: start;
}

.page-faq .faq-rail__title {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(17px, 1.5vw, 20px);
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-seg {
  display: flex;
  flex-direction: row;
  gap: 8px;
  padding: 0 0 6px;
  border: 0;
  background: transparent;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-seg .seg__tab {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 auto;
  width: auto;
  white-space: nowrap;
  text-align: left;
  padding: 12px 16px;
  background: var(--cream);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  transition:
    transform 0.18s var(--ease),
    border-color 0.18s var(--ease),
    background 0.18s var(--ease),
    box-shadow 0.18s var(--ease);
}

.page-faq .faq-seg .seg__tab:hover {
  border-color: var(--lake);
}

.page-faq .faq-seg .seg__tab[aria-selected="true"] {
  background: var(--lake);
  border-color: var(--lake);
  color: var(--cream);
  box-shadow: var(--shadow-lift);
}

.page-faq .faq-seg .seg__tab:focus-visible {
  outline: 3px solid var(--faq-focus);
  outline-offset: 2px;
}

.page-faq .faq-rail__note {
  margin: 16px 0 0;
  padding-left: 12px;
  border-left: 3px solid var(--sunset-soft);
  font-size: 15px;
  line-height: 1.72;
  color: var(--faq-ink-soft);
}

/* ---------- 面板头 ---------- */
.page-faq .faq-panel {
  padding: 0;
}

.page-faq .faq-panel__head {
  margin-bottom: 22px;
  padding-top: 16px;
  border-top: 3px solid var(--ink);
}

.page-faq .faq-panel__lede {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.82;
  color: var(--faq-ink-soft);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-q {
  margin: 0 0 14px;
  background: var(--cream);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  box-shadow: var(--shadow-paper);
  overflow: hidden;
  transition:
    box-shadow 0.2s var(--ease),
    border-color 0.2s var(--ease);
}

.page-faq .faq-q:hover {
  box-shadow: var(--shadow-lift);
}

.page-faq .faq-q[open] {
  border-left: 4px solid var(--sunset);
}

.page-faq .faq-q > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 20px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-head);
  font-size: clamp(17px, 1.6vw, 19px);
  font-weight: 800;
  line-height: 1.45;
  color: var(--ink);
}

.page-faq .faq-q > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-q > summary::marker {
  content: "";
}

.page-faq .faq-q > summary::before {
  content: "+";
  flex: 0 0 auto;
  transform: translateY(1px);
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--sunset);
}

.page-faq .faq-q[open] > summary::before {
  content: "−";
  color: var(--lake);
}

.page-faq .faq-q__a {
  padding: 0 20px 20px 54px;
  font-size: 17px;
  line-height: 1.82;
  color: var(--ink);
}

.page-faq .faq-q__a p {
  margin: 0 0 12px;
}

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

.page-faq .faq-q__a a {
  color: var(--lake);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

/* ---------- 分层示意图 ---------- */
.page-faq .faq-diagram {
  margin: 18px 0 8px;
  padding: 16px;
  background: var(--sand);
  border: 1px dashed var(--rule);
  border-radius: var(--radius);
}

.page-faq .faq-stackmap {
  display: block;
  width: 100%;
  max-width: 420px;
  height: auto;
}

.page-faq .faq-stackmap text {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 800;
}

.page-faq .faq-diagram__cap {
  margin: 12px 0 0;
  font-size: 14px;
  letter-spacing: 0.05em;
  color: var(--faq-ink-soft);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 18px 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--sand);
  object-fit: cover;
}

.page-faq .faq-figure--tall img {
  object-fit: contain;
}

/* ---------- 步骤流程 ---------- */
.page-faq .faq-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps li {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px 10px 10px;
  background: var(--cream);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .faq-steps__n {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--lake);
  color: var(--cream);
  font-size: 14px;
}

.page-faq .faq-steps li + li::before {
  content: "→";
  position: absolute;
  left: -13px;
  top: 50%;
  transform: translateY(-50%);
  font-weight: 800;
  line-height: 1;
  color: var(--sunset);
}

/* ---------- 联系条 ---------- */
.page-faq .faq-contact {
  display: grid;
  gap: 10px;
  margin: 4px 0 0;
  padding: 20px;
  background: var(--lake-deep);
  border-radius: var(--radius);
  color: var(--cream);
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
}

.page-faq .faq-contact__key {
  min-width: 72px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--sunset-soft);
}

.page-faq .faq-contact__val {
  font-family: var(--font-mono);
  font-size: 16px;
  word-break: break-all;
}

.page-faq .faq-contact__note {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(252, 247, 238, 0.78);
}

.page-faq .faq-contact__note a {
  color: var(--sunset-soft);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 延伸入口 ---------- */
.page-faq .faq-next {
  border-top: 1px solid var(--rule);
}

.page-faq .faq-next__card {
  display: block;
  padding: 22px 20px 20px;
  color: inherit;
  text-decoration: none;
  transition:
    transform 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
}

.page-faq .faq-next__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
}

.page-faq .faq-next__card:focus-visible {
  outline: 3px solid var(--faq-focus);
  outline-offset: 3px;
}

.page-faq .faq-next__go {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--sunset);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-next__card:nth-child(2) {
    margin-top: 28px;
  }

  .page-faq .faq-next__card:nth-child(3) {
    margin-top: 56px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.6fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
  }

  .page-faq .faq-seg {
    flex-direction: column;
    overflow-x: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-seg .seg__tab {
    width: 100%;
    border-left: 4px solid transparent;
  }

  .page-faq .faq-seg .seg__tab:hover {
    transform: translateX(3px);
  }

  .page-faq .faq-seg .seg__tab[aria-selected="true"] {
    border-left-color: var(--sunset);
  }

  .page-faq .faq-q:nth-child(even) {
    margin-left: 22px;
  }
}

@media (max-width: 600px) {
  .page-faq .faq-hero__stats {
    padding: 14px;
    gap: 10px 14px;
  }

  .page-faq .faq-q__a {
    padding-left: 20px;
  }

  .page-faq .faq-steps li + li::before {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-seg .seg__tab,
  .page-faq .faq-q,
  .page-faq .faq-next__card {
    transition: none;
  }

  .page-faq .faq-seg .seg__tab:hover,
  .page-faq .faq-next__card:hover {
    transform: none;
  }
}