.page-faq {
  --faq-sticky: 104px;
  position: relative;
  background:
    radial-gradient(115% 62% at 90% -4%, rgba(22, 164, 106, .16) 0%, rgba(8, 24, 43, 0) 60%),
    radial-gradient(90% 50% at 4% 8%, rgba(255, 90, 44, .07) 0%, rgba(8, 24, 43, 0) 62%),
    var(--navy);
  color: var(--cool);
  overflow-x: clip;
  overflow-wrap: break-word;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumbs {
  padding-top: clamp(18px, 3vw, 36px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 4.4vw, 62px) 0 clamp(34px, 5vw, 72px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 58px 58px;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(102deg, #000 0%, rgba(0, 0, 0, .25) 58%, transparent 78%);
  mask-image: linear-gradient(102deg, #000 0%, rgba(0, 0, 0, .25) 58%, transparent 78%);
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.6vw, 46px);
  align-items: start;
}

.page-faq .faq-hero__copy .eyebrow {
  color: var(--pitch);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(32px, 5.6vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: #fff;
  text-wrap: balance;
}

.page-faq .faq-mark {
  display: inline;
  background-image: linear-gradient(transparent 62%, rgba(22, 164, 106, .45) 62%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
  padding-bottom: 2px;
}

.page-faq .faq-hero__copy .lede {
  margin: 20px 0 0;
  max-width: 46ch;
  color: rgba(233, 239, 245, .86);
}

.page-faq .faq-hero__note {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 首屏节点板 ---------- */
.page-faq .faq-board {
  padding: clamp(20px, 2.6vw, 30px);
  border-top: 2px solid var(--pitch);
  box-shadow: 22px 24px 0 -18px rgba(5, 14, 25, .9);
}

.page-faq .faq-board__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--steel);
}

.page-faq .faq-board__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-board__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding-bottom: 13px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-board__list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-board__when {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--amber);
  white-space: nowrap;
}

.page-faq .faq-board__what {
  font-size: 15px;
  color: var(--cool);
}

.page-faq .faq-board__foot {
  margin: 22px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--steel);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  padding: clamp(20px, 2.8vw, 42px) 0 clamp(44px, 6.4vw, 92px);
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.2vw, 46px);
  align-items: start;
}

.page-faq .faq-side {
  position: static;
}

/* ---------- 分类导航 ---------- */
.page-faq .faq-toc {
  padding: 0;
}

.page-faq .faq-toc .toc__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--steel);
}

.page-faq .faq-toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-toc li + li {
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-toc a {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--steel);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color .22s var(--ease), border-color .22s var(--ease), background-color .22s var(--ease);
}

.page-faq .faq-toc a:hover {
  color: var(--cool);
  background: rgba(15, 42, 68, .55);
}

.page-faq .faq-toc a[aria-current="true"] {
  color: #fff;
  border-left-color: var(--pitch);
  background: linear-gradient(90deg, rgba(15, 42, 68, .95), rgba(15, 42, 68, .35));
}

/* ---------- 筛选控制台 ---------- */
.page-faq .faq-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-bottom: 14px;
  margin-bottom: clamp(14px, 2vw, 24px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-toolbar .filter-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
}

/* ---------- 问答列表 ---------- */
.page-faq .faq-list {
  display: block;
}

.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(15, 42, 68, .34), rgba(8, 24, 43, 0) 76%);
}

.page-faq .faq-item[open] {
  background: linear-gradient(96deg, rgba(15, 42, 68, .96) 0%, rgba(8, 24, 43, .34) 62%, rgba(8, 24, 43, 0) 100%);
}

.page-faq .faq-item > summary {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 46px 18px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(16px, 1.55vw, 18.5px);
  line-height: 1.45;
  letter-spacing: -0.005em;
  color: var(--cool);
  transition: color .22s var(--ease);
}

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

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

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--pitch);
  outline-offset: -3px;
}

.page-faq .faq-item > summary::after {
  content: "";
  position: absolute;
  right: 20px;
  top: 50%;
  width: 9px;
  height: 9px;
  margin-top: -6px;
  border-right: 2px solid var(--pitch);
  border-bottom: 2px solid var(--pitch);
  transform: rotate(45deg);
  transition: transform .28s var(--ease), border-color .22s var(--ease);
}

.page-faq .faq-item[open] > summary::after {
  transform: rotate(-135deg);
  border-color: var(--amber);
}

.page-faq .faq-item__cat {
  flex: none;
  margin-top: 3px;
  padding: 3px 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--steel);
  border: 1px solid var(--line);
  white-space: nowrap;
}

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

.page-faq .faq-item__a {
  margin: 0 22px 22px 18px;
  padding-left: 16px;
  border-left: 2px solid var(--pitch);
  font-size: 16px;
  line-height: 1.78;
  color: rgba(233, 239, 245, .84);
}

.page-faq .faq-item__a p {
  margin: 0 0 14px;
}

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

.page-faq .faq-item__a a {
  color: var(--pitch);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__a a:hover {
  color: var(--amber);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 18px 0 0;
  display: block;
}

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

.page-faq .faq-figure figcaption {
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--steel);
}

.page-faq .faq-figure--portrait {
  margin: 6px 0 0;
  max-width: 220px;
}

.page-faq .faq-figure--portrait img {
  aspect-ratio: 9 / 16;
}

.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.page-faq .faq-split__text p {
  margin: 0 0 14px;
}

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

/* ---------- 空态 ---------- */
.page-faq .filter-empty {
  margin: 0;
  padding: 26px 20px;
  border-left: 2px solid var(--amber);
  background: rgba(15, 42, 68, .5);
  color: var(--steel);
  font-size: 15px;
  line-height: 1.7;
}

/* ---------- 收尾 CTA ---------- */
.page-faq .faq-cta {
  margin-top: clamp(26px, 3.4vw, 46px);
  padding: clamp(22px, 2.8vw, 34px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  background: linear-gradient(100deg, rgba(15, 42, 68, .96), rgba(8, 24, 43, .5));
  border-left: 3px solid var(--amber);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

.page-faq .faq-cta__text {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 22px);
  letter-spacing: -0.01em;
  color: #fff;
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

/* ---------- 窄屏：分类标签折到问题上方 ---------- */
@media (max-width: 719px) {
  .page-faq .faq-item > summary {
    flex-direction: column;
    gap: 8px;
    padding: 16px 44px 16px 16px;
  }

  .page-faq .faq-item__cat {
    align-self: flex-start;
    margin-top: 0;
  }

  .page-faq .faq-item__a {
    margin: 0 16px 20px 16px;
    padding-left: 14px;
  }

  .page-faq .faq-figure--portrait {
    max-width: 180px;
  }

  .page-faq .faq-cta {
    clip-path: none;
  }
}

/* ---------- 中屏：纵向图片与文字并排 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 26px;
  }
}

/* ---------- 宽屏：首屏分屏 ---------- */
@media (min-width: 880px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
  }
}

/* ---------- 桌面：左侧分类吸顶 ---------- */
@media (min-width: 980px) {
  .page-faq .faq-body__grid {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(30px, 3.6vw, 56px);
  }

  .page-faq .faq-side {
    position: sticky;
    top: var(--faq-sticky);
    align-self: start;
    max-height: calc(100vh - var(--faq-sticky) - 24px);
    overflow-y: auto;
  }
}

/* ---------- 窄屏：分类导航转横向滚动条 ---------- */
@media (max-width: 979px) {
  .page-faq .faq-toc .toc__title {
    margin-bottom: 8px;
  }

  .page-faq .faq-toc ul {
    display: flex;
    flex-wrap: nowrap;
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 6px;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

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

  .page-faq .faq-toc li {
    flex: none;
  }

  .page-faq .faq-toc li + li {
    border-top: 0;
  }

  .page-faq .faq-toc a {
    border-left: 0;
    border-bottom: 2px solid transparent;
    padding: 8px 12px;
    white-space: nowrap;
    background: rgba(15, 42, 68, .5);
  }

  .page-faq .faq-toc a[aria-current="true"] {
    border-left-color: transparent;
    border-bottom-color: var(--pitch);
    background: rgba(15, 42, 68, .95);
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item > summary::after,
  .page-faq .faq-toc a {
    transition: none;
  }
}