.page-faq {
  --faq-gap: 14px;
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq .breadcrumb {
  margin: 22px 0 6px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 26px;
  padding: 14px 0 40px;
}

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

.page-faq .faq-hero h1 {
  margin: 10px 0 16px;
  font-size: clamp(34px, 6.6vw, 58px);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--bone);
}

.page-faq .faq-hero .lede {
  max-width: 40em;
  margin: 0;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.85;
}

.page-faq .faq-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__chips li {
  padding: 6px 13px;
  border: 1px solid rgba(91, 227, 122, 0.28);
  border-radius: 999px;
  background: rgba(91, 227, 122, 0.08);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.page-faq .faq-hero__chips li:nth-child(2) {
  border-color: rgba(255, 138, 61, 0.34);
  background: rgba(255, 138, 61, 0.1);
  color: var(--pulse);
}

.page-faq .faq-hero__art {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
}

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

.page-faq .faq-hero__art::after {
  content: "";
  position: absolute;
  right: -18px;
  bottom: -18px;
  width: 108px;
  height: 108px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 32%, rgba(91, 227, 122, 0.55), rgba(91, 227, 122, 0));
  pointer-events: none;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 30px;
  align-items: start;
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-rail__list a {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  border-left: 2px solid transparent;
  border-radius: var(--r-sm);
  color: var(--mist);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--bone);
  background: var(--night);
  border-left-color: var(--lime);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--electric);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  padding: 30px 0 6px;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 84px;
}

.page-faq .faq-group:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-group__index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--pulse);
}

.page-faq .faq-group__head h2 {
  margin: 8px 0 8px;
}

.page-faq .faq-group__desc {
  max-width: 46em;
  margin: 0 0 20px;
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.8;
}

.page-faq .faq-group__art {
  border-radius: var(--r-md);
  overflow: hidden;
}

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

/* ---------- 问答项 ---------- */
.page-faq .faq-item {
  margin-bottom: 10px;
  border: 1px solid var(--line-dim);
  border-left: 3px solid var(--line-dim);
  border-radius: var(--r-md);
  background: var(--night);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--lime);
  background: var(--night-2);
}

.page-faq .faq-item summary {
  position: relative;
  padding: 16px 48px 16px 18px;
  color: var(--bone);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  list-style: none;
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-item summary:hover {
  color: #ffffff;
}

.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 18px;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--electric);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item[open] summary::after {
  content: "\2013";
  color: var(--lime);
}

.page-faq .faq-item__body {
  padding: 14px 18px 20px;
  border-top: 1px solid var(--line-dim);
}

.page-faq .faq-item__body p {
  margin: 0 0 12px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.85;
}

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

.page-faq .faq-item__body a {
  color: var(--electric);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 139, 255, 0.42);
}

.page-faq .faq-item__body a:hover {
  border-bottom-color: var(--lime);
}

.page-faq .faq-lead {
  color: var(--bone) !important;
  font-weight: 600;
  font-size: 15.5px !important;
}

/* ---------- 步骤卡 ---------- */
.page-faq .step-line {
  display: grid;
  gap: 10px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .step-card {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid rgba(46, 139, 255, 0.18);
  border-radius: var(--r-sm);
  background: rgba(46, 139, 255, 0.07);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.page-faq .step-card:hover {
  border-color: rgba(91, 227, 122, 0.45);
  background: rgba(46, 139, 255, 0.14);
  transform: translateY(-2px);
}

.page-faq .step-card__num {
  flex: none;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(255, 138, 61, 0.16);
  color: var(--pulse);
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-faq .step-card p {
  margin: 0;
  color: var(--bone);
  font-size: 14px;
  line-height: 1.65;
}

/* ---------- 旁注 ---------- */
.page-faq .faq-note {
  margin: 14px 0 0;
  padding: 12px 14px;
  border-left: 2px solid var(--clay);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: rgba(194, 112, 78, 0.1);
  color: var(--mist);
  font-size: 13.5px;
  line-height: 1.78;
}

.page-faq .faq-note a {
  color: var(--amber);
  border-bottom-color: rgba(255, 194, 75, 0.5);
}

/* ---------- 数据说明定义表 ---------- */
.page-faq .stat-defs {
  display: grid;
  gap: 1px;
  margin: 14px 0 0;
  border-radius: var(--r-sm);
  background: var(--line-dim);
  overflow: hidden;
}

.page-faq .stat-def {
  padding: 12px 14px;
  background: var(--night);
}

.page-faq .stat-def dt {
  margin-bottom: 4px;
  color: var(--bone);
  font-size: 14px;
  font-weight: 600;
}

.page-faq .stat-def dd {
  margin: 0;
  color: var(--mist);
  font-size: 13.5px;
  line-height: 1.75;
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-contact {
  display: grid;
  gap: 18px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, rgba(46, 139, 255, 0.16), rgba(91, 227, 122, 0.05));
}

.page-faq .mail-list {
  display: grid;
  gap: 8px;
  margin: 12px 0 16px;
  padding: 0;
  list-style: none;
}

.page-faq .mail-list li {
  position: relative;
  padding-left: 20px;
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.7;
}

.page-faq .mail-list li::before {
  content: "";
  position: absolute;
  top: 0.66em;
  left: 4px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lime);
}

.page-faq .faq-contact__line {
  margin: 0 0 6px;
  color: var(--bone);
  font-size: 14.5px;
  line-height: 1.75;
}

.page-faq .faq-contact__line a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(91, 227, 122, 0.45);
  word-break: break-all;
}

.page-faq .faq-contact__cta {
  align-self: start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .stat-defs {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 720px) {
  .page-faq .step-line {
    grid-auto-flow: column;
    grid-auto-columns: 1fr;
  }

  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 48px;
    align-items: center;
    padding: 20px 0 62px;
  }

  .page-faq .faq-group__head--split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 32px;
    align-items: center;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-body {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 56px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 26px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .step-card,
  .page-faq .faq-rail__list a {
    transition: none;
  }

  .page-faq .step-card:hover {
    transform: none;
  }
}