.page-faq {
  --faq-panel: rgba(14, 21, 51, .58);
  --faq-hair: rgba(58, 74, 140, .28);
  --faq-hair-soft: rgba(58, 74, 140, .18);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(84px, 13vh, 132px) clamp(44px, 7vh, 76px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    radial-gradient(rgba(148, 163, 196, .16) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 78%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: 14%;
  right: -14%;
  z-index: -1;
  width: min(620px, 66vw);
  height: clamp(220px, 34vh, 340px);
  background: linear-gradient(118deg, rgba(23, 200, 166, .18), rgba(46, 155, 255, .06) 62%, transparent);
  clip-path: polygon(17% 0, 100% 0, 83% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero .crumbs {
  margin-bottom: clamp(26px, 4vh, 42px);
}

.page-faq .faq-hero-title {
  margin: 16px 0 0;
  font-size: clamp(38px, 6.6vw, 82px);
  font-weight: 800;
  letter-spacing: -.022em;
  line-height: 1.04;
  color: var(--mist);
}

.page-faq .faq-hero-copy {
  margin-top: clamp(22px, 3.4vh, 34px);
  max-width: 68ch;
}

.page-faq .faq-hero-lede {
  margin: 0;
  font-size: clamp(15.5px, 1.15vw, 17.5px);
  line-height: 1.78;
  color: var(--steel);
}

.page-faq .faq-hero-note {
  margin: 14px 0 0;
  padding-left: 16px;
  border-left: 2px solid rgba(23, 200, 166, .55);
  font-size: 15px;
  line-height: 1.75;
  color: rgba(242, 246, 255, .78);
}

.page-faq .faq-hero-stats {
  margin-top: clamp(34px, 5vh, 56px);
  padding-top: clamp(22px, 3vh, 30px);
  border-top: 1px solid var(--faq-hair);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 24px;
}

.page-faq .faq-toolbar {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .faq-toolbar-label {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--steel);
  margin: 0;
}

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

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

/* ---------- 编号索引 ---------- */
.page-faq .faq-rail {
  padding: 16px 14px;
  border: 1px solid var(--faq-hair);
  border-radius: var(--r-md);
  background: var(--faq-panel);
}

.page-faq .faq-rail-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--steel);
}

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

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

.page-faq .faq-toc a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  border: 1px solid var(--faq-hair);
  border-radius: var(--r-pill);
  white-space: nowrap;
  font-size: 13px;
  line-height: 1.4;
  color: var(--steel);
  text-decoration: none;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-faq .faq-toc a .mono {
  color: var(--teal);
  font-size: 11.5px;
  letter-spacing: .06em;
}

.page-faq .faq-toc a:hover,
.page-faq .faq-toc a:focus-visible {
  color: var(--mist);
  border-color: rgba(23, 200, 166, .6);
  background: rgba(23, 200, 166, .1);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  padding: clamp(22px, 3.4vw, 36px) clamp(18px, 3vw, 34px);
  border-radius: var(--r-lg);
  background: var(--faq-panel);
  border: 1px solid var(--faq-hair-soft);
}

.page-faq .faq-group + .faq-group {
  margin-top: 20px;
}

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

.page-faq .faq-group-title {
  margin: 10px 0 0;
  font-size: clamp(21px, 2.9vw, 30px);
  font-weight: 700;
  letter-spacing: -.012em;
  line-height: 1.24;
  color: var(--mist);
}

.page-faq .faq-group-lede {
  margin: 10px 0 0;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--steel);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-q {
  border-top: 1px solid var(--faq-hair-soft);
}

.page-faq .faq-q:first-of-type {
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-q-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 18px 6px;
  cursor: pointer;
  list-style: none;
  border-radius: var(--r-sm);
  transition: background-color 200ms var(--ease);
}

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

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

.page-faq .faq-q-num {
  flex: 0 0 auto;
  padding: 3px 9px;
  border: 1px solid rgba(23, 200, 166, .34);
  border-radius: var(--r-pill);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--teal);
}

.page-faq .faq-q-text {
  flex: 1 1 220px;
  min-width: 0;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--mist);
  transition: color 200ms var(--ease);
}

.page-faq .faq-q-tag {
  flex: 0 0 auto;
  font-size: 11.5px;
  letter-spacing: .06em;
}

.page-faq .faq-q .disclosure-arrow {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--teal);
  border-bottom: 2px solid var(--teal);
  transform: rotate(45deg);
  transition: transform 240ms var(--ease);
}

.page-faq .faq-q[open] .disclosure-arrow {
  transform: rotate(-135deg);
}

.page-faq .faq-q-head:hover {
  background: linear-gradient(90deg, rgba(23, 200, 166, .1), transparent 72%);
}

.page-faq .faq-q-head:hover .faq-q-text {
  color: #ffffff;
}

.page-faq .faq-q > .disclosure-body {
  padding: 0 6px 22px;
  max-width: 74ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--steel);
}

.page-faq .faq-q > .disclosure-body p {
  margin: 0 0 12px;
}

.page-faq .faq-q > .disclosure-body p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-q > .disclosure-body a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(23, 200, 166, .45);
  transition: border-color 200ms var(--ease), color 200ms var(--ease);
}

.page-faq .faq-q > .disclosure-body a:hover,
.page-faq .faq-q > .disclosure-body a:focus-visible {
  color: var(--mist);
  border-bottom-color: var(--mist);
}

/* ---------- 图注 ---------- */
.page-faq .faq-figure {
  margin: 6px 0 22px;
  border: 1px solid var(--faq-hair);
  border-radius: var(--r-md);
  overflow: hidden;
  background: linear-gradient(136deg, var(--ink-800), var(--ink-700));
}

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

.page-faq .faq-figure-cap {
  margin: 0;
  padding: 11px 16px;
  border-top: 1px solid var(--faq-hair);
  background: rgba(7, 11, 34, .55);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--steel);
}

/* ---------- 空态 ---------- */
.page-faq .faq-empty {
  margin: 0 0 20px;
  padding: 22px 20px;
  border: 1px dashed var(--faq-hair);
  border-radius: var(--r-md);
  font-size: 15px;
  color: var(--steel);
  background: rgba(14, 21, 51, .4);
}

/* ---------- 联系区 ---------- */
.page-faq .faq-group--contact {
  background: linear-gradient(150deg, rgba(22, 32, 90, .72), rgba(14, 21, 51, .62));
  border-color: var(--faq-hair);
}

.page-faq .faq-contact {
  display: grid;
  gap: 14px;
  margin-bottom: 22px;
}

.page-faq .faq-contact-card {
  padding: 18px 20px;
  border: 1px solid var(--faq-hair);
  border-radius: var(--r-md);
  background: rgba(7, 11, 34, .45);
}

.page-faq .faq-contact-label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--steel);
}

.page-faq .faq-contact-value {
  margin: 8px 0 0;
  font-size: clamp(16px, 1.5vw, 19px);
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--teal);
  word-break: break-word;
}

.page-faq .faq-contact-note {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel);
}

.page-faq .faq-flow {
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-flow-item {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 14px 2px;
  border-bottom: 1px solid var(--faq-hair-soft);
}

.page-faq .faq-flow-index {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--azure);
}

.page-faq .faq-flow-text {
  font-size: 15px;
  line-height: 1.72;
  color: var(--steel);
}

.page-faq .faq-contact-tail {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--steel);
}

.page-faq .faq-contact-tail a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(23, 200, 166, .45);
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-faq .faq-contact-tail a:hover,
.page-faq .faq-contact-tail a:focus-visible {
  color: var(--mist);
  border-bottom-color: var(--mist);
}

/* ---------- 焦点可见性 ---------- */
.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-group {
    padding-inline: clamp(24px, 3.6vw, 40px);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 272px minmax(0, 1fr);
    gap: 40px 44px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-self: start;
    max-height: calc(100vh - var(--header-h) - 48px);
    overflow-y: auto;
    padding: 20px 18px;
  }

  .page-faq .faq-toc {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-toc li + li {
    margin-top: 2px;
  }

  .page-faq .faq-toc a {
    display: flex;
    width: 100%;
    justify-content: flex-start;
    padding: 8px 10px;
    border-color: transparent;
    border-radius: var(--r-sm);
    font-size: 13.5px;
    white-space: normal;
  }

  .page-faq .faq-q-text {
    font-size: 17.5px;
  }

  .page-faq .faq-q-head {
    padding: 20px 8px;
  }

  .page-faq .faq-q > .disclosure-body {
    padding: 0 8px 26px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0ms !important;
  }
}

/* ---------- 打印 ---------- */
@media print {
  .page-faq .faq-rail,
  .page-faq .faq-toolbar {
    display: none;
  }

  .page-faq .faq-q > .disclosure-body {
    display: block !important;
  }

  .page-faq .faq-group,
  .page-faq .faq-figure,
  .page-faq .faq-contact-card {
    background: #ffffff !important;
    border-color: #cccccc !important;
  }

  .page-faq .faq-group-title,
  .page-faq .faq-q-text,
  .page-faq .faq-contact-value,
  .page-faq .faq-contact-tail,
  .page-faq .faq-group-lede,
  .page-faq .faq-q > .disclosure-body,
  .page-faq .faq-flow-text,
  .page-faq .faq-contact-note {
    color: #101010 !important;
  }
}