/* ===== 知识中心 / page-faq ===== */
.page-faq {
  --faq-rail-w: 208px;
  padding-bottom: clamp(56px, 8vw, 110px);
}

/* 面包屑与首屏 */
.page-faq .breadcrumb {
  padding-top: clamp(20px, 3vw, 32px);
}

.page-faq .faq-hero {
  margin-top: clamp(16px, 2.4vw, 26px);
}

.page-faq .faq-hero::before {
  content: "";
  display: block;
  height: 8px;
  margin-bottom: 12px;
  background-image: repeating-linear-gradient(90deg, var(--line-strong) 0 1px, transparent 1px 12px);
}

.page-faq .faq-hero__frame {
  position: relative;
  border: 1px solid var(--line-strong);
  padding: clamp(22px, 4vw, 48px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  box-shadow: inset 0 1px 0 rgba(59, 224, 206, 0.28);
}

.page-faq .faq-hero__frame::before,
.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  width: 9px;
  height: 9px;
  background: var(--gold);
  pointer-events: none;
}

.page-faq .faq-hero__frame::before {
  top: -5px;
  left: -5px;
}

.page-faq .faq-hero__frame::after {
  right: -5px;
  bottom: -5px;
}

.page-faq .faq-hero__lead > .annotation {
  margin: 0 0 14px;
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  color: var(--paper);
  letter-spacing: -0.03em;
  line-height: 1.14;
}

.page-faq .faq-hero__intro {
  margin: 0;
  max-width: 46ch;
  color: var(--paper);
  opacity: 0.86;
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-hero__media figcaption {
  padding: 10px 12px;
  border-top: 1px solid var(--line);
}

@media (min-width: 880px) {
  .page-faq .faq-hero__frame {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
  }
}

/* 01 三类快速入口 */
.page-faq .faq-quick {
  margin-top: clamp(44px, 6vw, 76px);
}

.page-faq .faq-quick__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.page-faq .faq-quick__list > li {
  display: flex;
  min-width: 0;
}

.page-faq .faq-quick__link {
  flex: 1 1 auto;
  min-width: 0;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: 3px 14px;
  padding: 20px 18px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: var(--paper);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-quick__key {
  grid-row: span 2;
  align-self: center;
  font-size: 24px;
  line-height: 1;
  color: var(--gold);
}

.page-faq .faq-quick__name {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: -0.01em;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-quick__desc {
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

.page-faq .faq-quick__link:hover,
.page-faq .faq-quick__link:focus-visible {
  background: rgba(59, 224, 206, 0.06);
  border-color: var(--cyan);
}

.page-faq .faq-quick__link:hover .faq-quick__name,
.page-faq .faq-quick__link:focus-visible .faq-quick__name {
  color: var(--cyan);
}

@media (min-width: 760px) {
  .page-faq .faq-quick__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-quick__link {
    padding: 26px 22px;
  }
}

/* 问答主体：主栏 + 常驻目录 */
.page-faq .faq-body {
  margin-top: clamp(48px, 6vw, 84px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 44px);
}

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

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) var(--faq-rail-w);
    align-items: start;
    gap: clamp(36px, 4vw, 64px);
  }
}

/* 右侧锚点目录 */
.page-faq .faq-rail {
  order: -1;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
}

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

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail__link {
  display: block;
  flex: 0 0 auto;
  scroll-snap-align: start;
  white-space: nowrap;
  padding: 7px 12px;
  border: 1px solid var(--line);
  text-decoration: none;
  color: var(--mist);
  font-size: 13px;
  line-height: 1.4;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .faq-rail__link[data-active],
.page-faq .faq-rail__link[aria-current] {
  color: var(--gold);
  border-color: rgba(233, 180, 76, 0.55);
}

@media (min-width: 1000px) {
  .page-faq .faq-rail {
    order: 0;
    position: sticky;
    top: calc(var(--header-h) + 20px);
    border: 0;
    border-left: 1px solid var(--line-strong);
    padding: 4px 0 4px 18px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-rail__link {
    border: 0;
    border-left: 2px solid transparent;
    padding: 8px 0 8px 12px;
    white-space: normal;
    font-size: 14px;
  }

  .page-faq .faq-rail__link[data-active],
  .page-faq .faq-rail__link[aria-current] {
    border-left-color: var(--gold);
    color: var(--paper);
  }
}

/* 分组与折叠问答 */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(40px, 5vw, 64px);
}

.page-faq .faq-group__list {
  margin-top: clamp(12px, 2vw, 20px);
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: clamp(15px, 2vw, 21px) 0;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
  font-size: clamp(16px, 1.5vw, 18px);
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: -0.01em;
  transition: color var(--dur) var(--ease);
}

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

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

.page-faq .faq-item__q:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: 3px;
}

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

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  border: 1px solid var(--moss);
  transition: border-color var(--dur) var(--ease), transform var(--dur-slow) var(--ease);
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--mist);
  transition: opacity var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-item__mark::before {
  width: 9px;
  height: 1px;
}

.page-faq .faq-item__mark::after {
  width: 1px;
  height: 9px;
}

.page-faq .faq-item[open] .faq-item__mark {
  border-color: var(--cyan);
  transform: rotate(90deg);
}

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

.page-faq .faq-item[open] .faq-item__mark::after {
  opacity: 0;
}

.page-faq .faq-item__a {
  max-width: 66ch;
  margin-left: 1px;
  padding: 0 0 clamp(18px, 2.4vw, 26px) 18px;
  border-left: 1px solid var(--line-strong);
}

.page-faq .faq-item[open] > .faq-item__a {
  animation: faqReveal var(--dur-slow) var(--ease) both;
}

@keyframes faqReveal {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-item__a p {
  margin: 0 0 0.8em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.84;
}

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

/* 观看章节配图 */
.page-faq .faq-media {
  margin: clamp(22px, 3vw, 32px) 0 0;
  max-width: 320px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.page-faq .faq-media figcaption {
  padding: 10px 12px;
  border-top: 1px solid var(--line);
}

/* 结尾反白区块 */
.page-faq .faq-group--paper {
  margin-top: clamp(44px, 5vw, 68px);
  padding: clamp(22px, 3vw, 36px);
  background: var(--paper-2);
  color: var(--ink);
  box-shadow: 10px 10px 0 rgba(168, 92, 60, 0.45);
}

.page-faq .faq-group--paper .section-head__title {
  color: var(--ink);
}

.page-faq .faq-group--paper .faq-group__list {
  border-top-color: rgba(10, 31, 26, 0.22);
}

.page-faq .faq-group--paper .faq-item {
  border-bottom-color: rgba(10, 31, 26, 0.18);
}

.page-faq .faq-group--paper .faq-item__q {
  color: var(--ink);
}

.page-faq .faq-group--paper .faq-item__q:hover {
  color: var(--clay);
}

.page-faq .faq-group--paper .faq-item[open] > .faq-item__q {
  color: var(--clay);
}

.page-faq .faq-group--paper .faq-item__mark {
  border-color: rgba(10, 31, 26, 0.35);
}

.page-faq .faq-group--paper .faq-item__mark::before,
.page-faq .faq-group--paper .faq-item__mark::after {
  background: var(--clay);
}

.page-faq .faq-group--paper .faq-item[open] .faq-item__mark {
  border-color: var(--clay);
}

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

.page-faq .faq-group--paper .faq-item__a {
  border-left-color: rgba(10, 31, 26, 0.24);
}

.page-faq .faq-group--paper .faq-item__a p {
  color: rgba(10, 31, 26, 0.86);
  opacity: 1;
}

.page-faq .faq-group--paper .link-underline {
  color: var(--clay);
}

.page-faq .faq-help__cta {
  margin: clamp(20px, 3vw, 28px) 0 0;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    animation: none !important;
    transition: none !important;
  }
}
<<<END>>>