.page-faq {
  --faq-rail: 250px;
  --faq-grad: linear-gradient(180deg, var(--cyan), var(--orange));
  padding-bottom: clamp(64px, 9vw, 110px);
}

/* ---------- 面包屑与首屏 ---------- */
.page-faq .breadcrumbs {
  padding-top: clamp(92px, 13vw, 132px);
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-faq .faq-hero {
  padding-bottom: clamp(30px, 5vw, 54px);
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(32px, 5vw, 56px);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(30px, 5.2vw, 58px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--paper);
  max-width: 20ch;
  margin: 14px 0 20px;
}

.page-faq .faq-hero__lede {
  max-width: 42ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--muted);
  margin: 0 0 18px;
}

.page-faq .faq-hero__note {
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  border-left: 2px solid var(--orange-line);
  padding-left: 12px;
  margin: 0;
}

.page-faq .faq-hero__note .contact-value {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
  word-break: break-all;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

/* ---------- 左侧索引轨道 ---------- */
.page-faq .faq-index {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.page-faq .faq-index__title {
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 10px;
}

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

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

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

.page-faq .rail-link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 12px;
  border-left: 2px solid transparent;
  border-radius: 0 10px 10px 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.16s var(--ease), background 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-faq .rail-link:hover,
.page-faq .rail-link.is-active {
  color: var(--paper);
  border-left-color: var(--cyan);
  background: var(--cyan-soft);
}

.page-faq .qa-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

/* ---------- 问题分组 ---------- */
.page-faq .qa-group {
  scroll-margin-top: 108px;
  padding-bottom: clamp(40px, 6vw, 72px);
}

.page-faq .qa-group + .qa-group {
  border-top: 1px solid var(--line);
  padding-top: clamp(34px, 5vw, 56px);
}

.page-faq .qa-group__head {
  position: relative;
  padding-left: 20px;
  margin-bottom: 22px;
}

.page-faq .qa-group__head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 6px;
  width: 3px;
  border-radius: 999px;
  background: var(--faq-grad);
}

.page-faq .qa-group__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
  text-transform: uppercase;
}

.page-faq .qa-group__head h2 {
  font-family: var(--font-head);
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--paper);
  margin: 7px 0 10px;
}

.page-faq .qa-group__sub {
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
  margin: 0;
}

/* ---------- 问答条目 ---------- */
.page-faq .qa-item {
  border-top: 1px solid var(--line);
}

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

.page-faq .qa-q {
  position: relative;
  display: block;
  list-style: none;
  cursor: pointer;
  padding: 18px 38px 18px 2px;
  font-family: var(--font-head);
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 600;
  line-height: 1.45;
  color: var(--paper);
  transition: color 0.16s var(--ease);
}

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

.page-faq .qa-q:hover {
  color: var(--cyan);
}

.page-faq .qa-q::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 50%;
  width: 10px;
  height: 10px;
  margin-top: -6px;
  border-right: 1.6px solid var(--cyan);
  border-bottom: 1.6px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform 0.22s var(--ease), margin-top 0.22s var(--ease);
}

.page-faq .qa-item[open] > .qa-q::after {
  transform: rotate(-135deg);
  margin-top: -3px;
}

.page-faq .qa-item[open] > .qa-q {
  color: var(--cyan);
}

.page-faq .qa-a {
  max-width: 60ch;
  padding: 2px 12px 24px 2px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
  animation: faq-open 0.22s var(--ease);
}

.page-faq .qa-a p {
  margin: 0;
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 等宽序号步骤 ---------- */
.page-faq .qa-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-faq .qa-steps > li,
.page-faq .faq-prep__list > li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
}

.page-faq .qa-steps > li > p,
.page-faq .faq-prep__list > li > p {
  margin: 0;
}

.page-faq .qa-step__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
  text-align: center;
  border-bottom: 1px solid var(--cyan-line);
  padding-bottom: 2px;
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: clamp(24px, 4vw, 36px) 0 0;
}

.page-faq .faq-figure .figure-frame {
  border-radius: var(--radius-card);
  overflow: hidden;
}

.page-faq .faq-figure--narrow {
  max-width: 420px;
}

/* ---------- 联系客服前 ---------- */
.page-faq .faq-prep {
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: clamp(22px, 3.4vw, 36px);
}

.page-faq .faq-prep__list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 14px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--paper);
}

.page-faq .faq-prep__notice {
  margin-bottom: 22px;
}

.page-faq .faq-prep__notice p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-prep__notice .notice-title {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--orange);
  margin-bottom: 6px;
}

.page-faq .faq-prep__notice a {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-style: dotted;
  text-underline-offset: 3px;
}

.page-faq .faq-prep__notice .contact-value {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--paper);
  word-break: break-all;
}

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

.page-faq .faq-prep__foot {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-prep__foot a {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-style: dotted;
  text-underline-offset: 3px;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(36px, 4.5vw, 60px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 108px;
    align-self: start;
    max-height: calc(100vh - 148px);
    overflow-y: auto;
    padding-right: 4px;
  }

  .page-faq .faq-index__list {
    display: grid;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

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

  .page-faq .rail-link {
    white-space: normal;
  }

  .page-faq .qa-figure--wide {
    margin-left: -32px;
  }
}

@media (min-width: 1000px) and (max-width: 1240px) {
  .page-faq .faq-figure .figure-frame--square {
    max-width: 360px;
  }
}

/* ---------- 中等屏 ---------- */
@media (max-width: 999px) {
  .page-faq .faq-index__title {
    margin-bottom: 8px;
  }

  .page-faq .faq-index__list {
    padding-bottom: 10px;
  }

  .page-faq .rail-link {
    background: rgba(76, 107, 102, 0.14);
    border-left: none;
    border-bottom: 2px solid transparent;
    border-radius: 12px 3px 12px 3px;
  }

  .page-faq .rail-link:hover,
  .page-faq .rail-link.is-active {
    border-left: none;
    border-bottom-color: var(--cyan);
  }
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 560px) {
  .page-faq .faq-hero h1 {
    font-size: clamp(27px, 8vw, 34px);
  }

  .page-faq .qa-q {
    padding: 16px 34px 16px 0;
  }

  .page-faq .qa-a {
    padding-right: 4px;
    font-size: 15.5px;
  }

  .page-faq .qa-steps > li,
  .page-faq .faq-prep__list > li {
    grid-template-columns: 28px minmax(0, 1fr);
    gap: 9px;
  }

  .page-faq .faq-prep__links .btn {
    flex: 1 1 auto;
    text-align: center;
  }
}

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

  .page-faq .qa-q,
  .page-faq .qa-q::after,
  .page-faq .rail-link {
    transition: none;
  }
}