.page-faq {
  --faq-line: rgba(16, 17, 20, .13);
  --faq-rail-w: 216px;
  display: block;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  padding: clamp(46px, 8vw, 96px) 0 clamp(34px, 5vw, 62px);
  border-bottom: 3px solid var(--ink-2);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 10% 0%, rgba(201, 162, 39, .15), transparent 58%),
    radial-gradient(90% 75% at 94% 100%, rgba(200, 51, 43, .17), transparent 62%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -70px;
  top: -46px;
  width: 260px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold));
  transform: rotate(-28deg);
  opacity: .7;
  pointer-events: none;
}

.page-faq .faq-hero > .sk-shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .sk-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 26px;
  font-size: 13px;
  color: rgba(245, 242, 234, .6);
}

.page-faq .faq-hero .sk-link {
  color: var(--gold-lite);
  text-decoration: none;
  border-bottom: 1px solid rgba(231, 200, 106, .34);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-hero .sk-link:hover {
  color: var(--paper);
  border-bottom-color: var(--cinnabar);
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold-lite);
}

.page-faq .faq-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-title);
  font-size: clamp(38px, 8.4vw, 74px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -.02em;
}

.page-faq .faq-hero__lede {
  max-width: 34em;
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(245, 242, 234, .78);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  font-size: 12.5px;
  letter-spacing: .02em;
  color: rgba(245, 242, 234, .56);
}

.page-faq .faq-hero__meta .sk-mono {
  color: var(--gold-lite);
}

/* ---------- 主体布局 ---------- */

.page-faq .faq-body {
  background: var(--paper);
  padding: clamp(28px, 5vw, 60px) 0 clamp(56px, 8vw, 96px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: start;
}

.page-faq .faq-main {
  display: flex;
  flex-direction: column;
  gap: clamp(38px, 6vw, 64px);
  min-width: 0;
}

/* ---------- 左侧分类导航 ---------- */

.page-faq .faq-nav {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--paper-2), var(--paper));
  padding: 14px 14px 12px;
}

.page-faq .faq-nav__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--slate);
}

.page-faq .faq-nav__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

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

.page-faq .faq-nav__link {
  display: block;
  white-space: nowrap;
  padding: 8px 12px 8px 10px;
  font-size: 13.5px;
  color: var(--ink);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: border-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              background-color var(--dur) var(--ease);
}

.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  border-left-color: var(--gold);
  background-color: rgba(201, 162, 39, .1);
  color: var(--cinnabar-deep);
}

/* ---------- 分区 ---------- */

.page-faq .faq-sec {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-sec__head {
  border-top: 2px solid var(--ink);
  padding-top: 14px;
  margin-bottom: 6px;
}

.page-faq .faq-eyebrow {
  margin: 0 0 7px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--slate);
}

.page-faq .faq-sec__title {
  margin: 0;
  font-family: var(--font-title);
  font-size: clamp(21px, 3.1vw, 28px);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.3;
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-list {
  display: block;
}

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

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

.page-faq .faq-item__q {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 8px 12px;
  align-items: start;
  padding: 15px 6px 15px 14px;
  cursor: pointer;
  list-style: none;
  transition: background-color var(--dur) var(--ease);
}

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

.page-faq .faq-item__q:hover {
  background-color: rgba(227, 222, 211, .5);
}

.page-faq .faq-item__q::before {
  content: "";
  position: absolute;
  left: 0;
  top: 19px;
  width: 3px;
  height: 0;
  background: var(--cinnabar);
  transition: height var(--dur) var(--ease);
}

.page-faq .faq-item[open] > .faq-item__q::before {
  height: 16px;
}

.page-faq .faq-item__no {
  padding-top: 3px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--slate);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item[open] .faq-item__no {
  color: var(--cinnabar);
}

.page-faq .faq-item__text {
  font-family: var(--font-title);
  font-size: clamp(15px, 1.7vw, 16.5px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
}

.page-faq .faq-item__mark {
  position: relative;
  width: 12px;
  height: 12px;
  margin-top: 7px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--slate);
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-item__mark::before {
  left: 0;
  top: 5.25px;
  width: 12px;
  height: 1.5px;
}

.page-faq .faq-item__mark::after {
  left: 5.25px;
  top: 0;
  width: 1.5px;
  height: 12px;
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: scaleY(0);
}

.page-faq .faq-item[open] .faq-item__mark::before {
  background: var(--cinnabar);
}

.page-faq .faq-item__answer {
  padding: 0 6px 20px 14px;
  max-width: 44em;
}

.page-faq .faq-item__answer p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

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

.page-faq .faq-item__answer a {
  color: var(--cinnabar-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 51, 43, .4);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

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

.page-faq .faq-meta {
  display: block;
  margin-top: 12px;
  padding-left: 10px;
  border-left: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--slate);
}

/* ---------- 图解 ---------- */

.page-faq .faq-figure {
  margin: 26px 0 0;
}

.page-faq .faq-figure__media {
  border: 1px solid var(--line-strong);
  background: var(--ink-2);
  overflow: hidden;
  box-shadow: var(--shadow-paper);
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-figure__media:hover {
  border-color: var(--gold);
  box-shadow: var(--shadow-paper-hover);
}

.page-faq .faq-figure__media--wide {
  aspect-ratio: 14 / 9;
}

.page-faq .faq-figure__media--band {
  aspect-ratio: 16 / 7;
}

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

.page-faq .faq-figure__caption {
  margin-top: 11px;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 宽幅对照表 ---------- */

.page-faq .faq-band {
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--line);
  padding: 22px 0 24px;
}

.page-faq .faq-band__head {
  margin-bottom: 16px;
}

.page-faq .faq-band__title {
  margin: 0;
  font-family: var(--font-title);
  font-size: clamp(19px, 2.6vw, 24px);
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-faq .faq-table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  box-shadow: var(--shadow-paper);
}

.page-faq .faq-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .faq-table thead th {
  background: var(--ink);
  color: var(--paper);
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: .06em;
  text-align: left;
  white-space: nowrap;
}

.page-faq .faq-table tbody td {
  padding: 13px 14px;
  border-top: 1px solid var(--faq-line);
  vertical-align: top;
  line-height: 1.7;
  color: var(--ink);
}

.page-faq .faq-table tbody tr:nth-child(even) {
  background: var(--paper-2);
}

.page-faq .faq-table tbody td:first-child {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cinnabar-deep);
  white-space: nowrap;
}

.page-faq .faq-band__note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 页尾提示 ---------- */

.page-faq .faq-tail {
  border: 1px solid var(--line-strong);
  background: linear-gradient(160deg, var(--paper-2), var(--paper) 62%);
  padding: clamp(22px, 3.4vw, 34px);
  box-shadow: var(--shadow-paper);
}

.page-faq .faq-tail__title {
  margin: 0 0 10px;
  font-family: var(--font-title);
  font-size: clamp(19px, 2.6vw, 24px);
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-faq .faq-tail__text {
  max-width: 40em;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.page-faq .faq-tail__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  margin-top: 20px;
}

.page-faq .faq-tail__note {
  margin: 18px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .faq-tail__note a {
  color: var(--cinnabar-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 51, 43, .38);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

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

/* ---------- 平板与桌面 ---------- */

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(34px, 4vw, 60px);
  }

  .page-faq .faq-nav {
    position: sticky;
    top: calc(var(--header-h) + 22px);
    padding: 16px 14px 14px;
  }

  .page-faq .faq-nav__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-faq .faq-nav__link {
    padding: 9px 10px;
    border-left-width: 2px;
  }

  .page-faq .faq-item__q {
    padding: 18px 8px 18px 16px;
  }

  .page-faq .faq-item__q::before {
    top: 22px;
  }

  .page-faq .faq-item__answer {
    padding: 0 8px 24px 16px;
  }
}

@media (min-width: 1280px) {
  .page-faq {
    --faq-rail-w: 232px;
  }

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

/* ---------- 减少动效 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
  }
}