.page-faq {
  --faq-radius: var(--k5-radius);
  --faq-shadow: 0 16px 40px rgba(0, 0, 0, .5);
  background: var(--k5-carbon);
  color: var(--k5-paper);
  font-family: var(--k5-font-body);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--k5-h-header) + 2.2rem) 0 3rem;
  border-bottom: 1px solid var(--k5-line-strong);
  background:
    radial-gradient(120% 100% at 86% 0%, var(--k5-cyan-a), transparent 60%),
    radial-gradient(95% 90% at 0% 100%, var(--k5-violet-a), transparent 62%),
    var(--k5-carbon);
}

.page-faq .faq-hero__deco {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: .6;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  margin-bottom: 1.7rem;
  font-family: var(--k5-font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--k5-steel);
}

.page-faq .faq-crumbs a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--k5-dur) var(--k5-ease), border-color var(--k5-dur) var(--k5-ease);
}

.page-faq .faq-crumbs a:hover,
.page-faq .faq-crumbs a:focus-visible {
  color: var(--k5-cyan);
  border-bottom-color: var(--k5-cyan);
}

.page-faq .faq-crumbs [aria-current="page"] {
  color: var(--k5-yellow);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 2rem;
}

.page-faq .faq-hero h1 {
  margin: .7rem 0 1rem;
  font-family: var(--k5-font-display);
  font-size: clamp(2.15rem, 7vw, 4.3rem);
  line-height: 1.03;
  letter-spacing: -.01em;
  color: var(--k5-paper);
  text-shadow: 0 0 28px rgba(0, 229, 255, .22);
}

.page-faq .faq-hero .k5-lede {
  max-width: 52ch;
  color: var(--k5-steel);
  font-size: 1rem;
  line-height: 1.8;
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump a {
  display: inline-block;
  padding: .5rem .85rem;
  border: 1px solid var(--k5-line-strong);
  background: rgba(20, 25, 35, .55);
  color: var(--k5-paper);
  font-family: var(--k5-font-mono);
  font-size: .76rem;
  letter-spacing: .06em;
  text-decoration: none;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: color var(--k5-dur) var(--k5-ease), border-color var(--k5-dur) var(--k5-ease), background var(--k5-dur) var(--k5-ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  color: var(--k5-carbon);
  background: var(--k5-cyan);
  border-color: var(--k5-cyan);
}

.page-faq .faq-quick {
  padding: 1.2rem 1.15rem 1.25rem;
  border: 1px solid var(--k5-line-strong);
  background: linear-gradient(180deg, rgba(20, 25, 35, .95), rgba(11, 13, 16, .95));
  box-shadow: inset 0 0 0 1px rgba(0, 229, 255, .07), var(--faq-shadow);
}

.page-faq .faq-quick__title {
  margin: 0 0 1rem;
  font-family: var(--k5-font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--k5-cyan);
}

.page-faq .faq-quick__list {
  display: grid;
  gap: .8rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-quick__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .65rem;
  align-items: start;
}

.page-faq .faq-quick__num {
  font-family: var(--k5-font-mono);
  font-size: .72rem;
  color: var(--k5-violet);
  padding-top: .15rem;
}

.page-faq .faq-quick__list a {
  color: var(--k5-paper);
  font-size: .9rem;
  line-height: 1.6;
  text-decoration: none;
  border-bottom: 1px dotted rgba(199, 209, 219, .4);
  transition: color var(--k5-dur) var(--k5-ease), border-color var(--k5-dur) var(--k5-ease);
}

.page-faq .faq-quick__list a:hover,
.page-faq .faq-quick__list a:focus-visible {
  color: var(--k5-cyan);
  border-bottom-color: var(--k5-cyan);
}

.page-faq .faq-quick__foot {
  margin-top: 1.2rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--k5-line);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: 2rem;
  padding-top: 2.6rem;
  padding-bottom: 4.5rem;
}

.page-faq .faq-index {
  padding-top: .9rem;
  border-top: 2px solid var(--k5-cyan);
}

.page-faq .faq-index__label {
  margin: 0 0 .8rem;
  font-family: var(--k5-font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--k5-steel);
}

.page-faq .faq-index__list {
  display: grid;
  gap: .1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__list a {
  display: flex;
  gap: .6rem;
  align-items: baseline;
  padding: .6rem .1rem;
  border-bottom: 1px solid var(--k5-line);
  color: var(--k5-steel);
  font-size: .92rem;
  text-decoration: none;
  transition: color var(--k5-dur) var(--k5-ease), border-color var(--k5-dur) var(--k5-ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--k5-paper);
  border-bottom-color: var(--k5-cyan);
}

.page-faq .faq-index__list span {
  font-family: var(--k5-font-mono);
  font-size: .7rem;
  color: var(--k5-cyan);
}

.page-faq .faq-index__note {
  margin: 1.2rem 0 0;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--k5-steel);
}

.page-faq .faq-index__note a {
  color: var(--k5-yellow);
  text-decoration: none;
  border-bottom: 1px solid rgba(230, 255, 0, .45);
}

.page-faq .faq-index__note a:hover,
.page-faq .faq-index__note a:focus-visible {
  color: var(--k5-carbon);
  background: var(--k5-yellow);
  border-bottom-color: transparent;
}

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

/* ---------- 章节 ---------- */
.page-faq .faq-block {
  padding: 2.4rem 0;
  border-top: 1px solid var(--k5-line);
  scroll-margin-top: calc(var(--k5-h-header) + 1.2rem);
}

.page-faq .faq-main > .faq-block:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-block__head {
  margin-bottom: 1.6rem;
}

.page-faq .faq-block h2 {
  margin: .45rem 0 .8rem;
  font-family: var(--k5-font-display);
  font-size: clamp(1.5rem, 4.2vw, 2.25rem);
  line-height: 1.12;
  color: var(--k5-paper);
}

.page-faq .faq-block__intro {
  max-width: 62ch;
  margin: 0;
  color: var(--k5-steel);
  font-size: .96rem;
  line-height: 1.85;
}

.page-faq .faq-block .k5-chapter {
  font-family: var(--k5-font-mono);
  font-size: .8rem;
  letter-spacing: .2em;
  color: var(--k5-cyan);
}

/* ---------- 图片 ---------- */
.page-faq .faq-media {
  position: relative;
  margin: 0 0 1.6rem;
  overflow: hidden;
  border: 1px solid var(--k5-line-strong);
  background: var(--k5-ink);
}

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

.page-faq .faq-media--sync {
  margin-bottom: 0;
}

/* ---------- 场景卡 ---------- */
.page-faq .faq-scenes {
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .faq-scene {
  position: relative;
  display: block;
  padding: 1.15rem 2.2rem 1.2rem 1.1rem;
  border: 1px solid var(--k5-line-strong);
  background: linear-gradient(150deg, rgba(20, 25, 35, .96), rgba(11, 13, 16, .96));
  color: inherit;
  text-decoration: none;
  transition: transform var(--k5-dur) var(--k5-ease), border-color var(--k5-dur) var(--k5-ease), box-shadow var(--k5-dur) var(--k5-ease);
}

.page-faq .faq-scene::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--k5-cyan);
  opacity: .45;
  transition: opacity var(--k5-dur) var(--k5-ease);
}

.page-faq .faq-scene:hover,
.page-faq .faq-scene:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(0, 229, 255, .6);
  box-shadow: 0 14px 32px rgba(0, 229, 255, .14);
}

.page-faq .faq-scene:hover::before,
.page-faq .faq-scene:focus-visible::before {
  opacity: 1;
}

.page-faq .faq-scene__tag {
  display: inline-block;
  margin-bottom: .6rem;
  padding: .16rem .45rem;
  border: 1px solid rgba(0, 229, 255, .5);
  font-family: var(--k5-font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--k5-cyan);
}

.page-faq .faq-scene__title {
  display: block;
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--k5-paper);
}

.page-faq .faq-scene__meta {
  display: block;
  margin-top: .45rem;
  font-family: var(--k5-font-mono);
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--k5-steel);
}

.page-faq .faq-scene__arrow {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--k5-font-mono);
  font-size: 1rem;
  color: var(--k5-cyan);
}

/* ---------- 步骤条 ---------- */
.page-faq .faq-rail {
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(0, 1fr);
  margin: 0 0 1.8rem;
  padding: 0;
  list-style: none;
}

.page-faq .faq-rail__item {
  padding: 1.05rem 1rem 1.15rem;
  border: 1px solid var(--k5-line);
  background: linear-gradient(158deg, rgba(0, 229, 255, .08), rgba(20, 25, 35, .92) 58%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-faq .faq-rail__num {
  display: inline-block;
  padding: .1rem .45rem;
  background: var(--k5-cyan);
  color: var(--k5-carbon);
  font-family: var(--k5-font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
}

.page-faq .faq-rail h3 {
  margin: .75rem 0 .45rem;
  font-size: 1.04rem;
  color: var(--k5-paper);
}

.page-faq .faq-rail p {
  margin: 0;
  color: var(--k5-steel);
  font-size: .87rem;
  line-height: 1.72;
}

.page-faq .faq-rail .k5-tag {
  display: inline-block;
  margin-top: .8rem;
}

.page-faq .faq-rail--tight {
  gap: .75rem;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-folds {
  display: grid;
  gap: .6rem;
}

.page-faq .k5-fold {
  border: 1px solid var(--k5-line-strong);
  background: var(--k5-ink);
  transition: border-color var(--k5-dur) var(--k5-ease);
}

.page-faq .k5-fold[open] {
  border-color: rgba(0, 229, 255, .5);
}

.page-faq .k5-fold__head {
  position: relative;
  padding: .95rem 2.7rem .95rem 1rem;
  color: var(--k5-paper);
  font-size: .96rem;
  font-weight: 600;
  line-height: 1.6;
  cursor: pointer;
  list-style: none;
}

.page-faq .k5-fold__head::-webkit-details-marker {
  display: none;
}

.page-faq .k5-fold__head::after {
  content: "+";
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--k5-font-mono);
  font-size: 1.05rem;
  color: var(--k5-cyan);
}

.page-faq .k5-fold[open] .k5-fold__head::after {
  content: "–";
}

.page-faq .k5-fold__head:hover {
  color: var(--k5-cyan);
}

.page-faq .k5-fold__body {
  padding: 0 1rem 1.05rem;
  color: var(--k5-steel);
  font-size: .89rem;
  line-height: 1.85;
}

/* ---------- 设备同步 ---------- */
.page-faq .faq-sync__grid {
  display: grid;
  gap: 1.3rem;
  margin-bottom: 1.8rem;
}

.page-faq .faq-points {
  display: grid;
  gap: .85rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-points li {
  position: relative;
  padding-left: 1.35rem;
  color: var(--k5-steel);
  font-size: .91rem;
  line-height: 1.8;
}

.page-faq .faq-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .6em;
  width: .5rem;
  height: .5rem;
  background: var(--k5-violet);
  transform: rotate(45deg);
}

/* ---------- 标签页 ---------- */
.page-faq .faq-tabs {
  margin-top: .4rem;
}

.page-faq .k5-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-bottom: 1.2rem;
  padding-bottom: .7rem;
  border-bottom: 1px solid var(--k5-line-strong);
}

.page-faq .k5-tabs__btn {
  appearance: none;
  padding: .55rem .85rem;
  border: 1px solid var(--k5-line-strong);
  background: transparent;
  color: var(--k5-steel);
  font-family: var(--k5-font-mono);
  font-size: .76rem;
  letter-spacing: .06em;
  cursor: pointer;
  transition: color var(--k5-dur) var(--k5-ease), background var(--k5-dur) var(--k5-ease), border-color var(--k5-dur) var(--k5-ease);
}

.page-faq .k5-tabs__btn:hover,
.page-faq .k5-tabs__btn:focus-visible {
  color: var(--k5-paper);
  border-color: var(--k5-cyan);
}

.page-faq .k5-tabs__btn[aria-selected="true"] {
  background: var(--k5-cyan);
  border-color: var(--k5-cyan);
  color: var(--k5-carbon);
}

.page-faq .k5-tabs__panel {
  padding-top: .2rem;
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .75rem;
  margin: 0 0 1.1rem;
  padding: 0;
  list-style: none;
}

.page-faq .faq-stat {
  padding: .8rem .85rem;
  border: 1px solid var(--k5-line);
  background: rgba(20, 25, 35, .72);
}

.page-faq .faq-stat__num {
  display: block;
  font-family: var(--k5-font-display);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--k5-cyan);
}

.page-faq .faq-stat__label {
  display: block;
  margin-top: .45rem;
  font-family: var(--k5-font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--k5-steel);
}

.page-faq .faq-panel-text {
  max-width: 64ch;
  margin: 0 0 .9rem;
  color: var(--k5-steel);
  font-size: .92rem;
  line-height: 1.85;
}

.page-faq .faq-panel-text:last-child {
  margin-bottom: 0;
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-support {
  margin-top: 2rem;
  padding: 1.7rem 1.15rem 1.8rem;
  border: 1px solid var(--k5-line-strong);
  background: var(--k5-paper);
  color: var(--k5-ink);
}

.page-faq .faq-support .k5-chapter {
  color: var(--k5-cyan-deep);
}

.page-faq .faq-support h2 {
  color: var(--k5-carbon);
}

.page-faq .faq-support__intro {
  max-width: 62ch;
  margin: 0 0 1.3rem;
  color: #3a4450;
  font-size: .93rem;
  line-height: 1.8;
}

.page-faq .faq-support__grid {
  display: grid;
  gap: 1.3rem;
}

.page-faq .faq-contact {
  display: grid;
  gap: .7rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-contact li {
  display: grid;
  gap: .2rem;
  padding-bottom: .7rem;
  border-bottom: 1px solid rgba(11, 13, 16, .12);
  font-size: .89rem;
  line-height: 1.6;
}

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

.page-faq .faq-contact__label {
  font-family: var(--k5-font-mono);
  font-size: .68rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--k5-cyan-deep);
}

.page-faq .faq-support__links {
  display: grid;
  gap: .55rem;
  align-content: start;
}

.page-faq .faq-support__links a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: .7rem .85rem;
  border: 1px solid rgba(11, 13, 16, .18);
  color: var(--k5-ink);
  font-size: .89rem;
  text-decoration: none;
  transition: background var(--k5-dur) var(--k5-ease), border-color var(--k5-dur) var(--k5-ease);
}

.page-faq .faq-support__links a span {
  font-family: var(--k5-font-mono);
  color: var(--k5-cyan-deep);
}

.page-faq .faq-support__links a:hover,
.page-faq .faq-support__links a:focus-visible {
  background: rgba(0, 229, 255, .16);
  border-color: var(--k5-cyan-deep);
}

/* ---------- 焦点可达性 ---------- */
.page-faq a:focus-visible,
.page-faq button:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--k5-cyan);
  outline-offset: 2px;
}

.page-faq .faq-support a:focus-visible {
  outline-color: var(--k5-cyan-deep);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-scenes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-rail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-support {
    padding: 2rem 1.6rem 2.1rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: calc(var(--k5-h-header) + 3rem) 0 3.6rem;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .85fr);
    gap: 2.6rem;
    align-items: start;
  }

  .page-faq .faq-sync__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
    align-items: start;
  }

  .page-faq .faq-support__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 2rem;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 3rem;
    padding-top: 3.2rem;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--k5-h-header) + 1.5rem);
    align-self: start;
  }

  .page-faq .faq-rail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-block {
    padding: 3rem 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-scene,
  .page-faq .faq-jump a,
  .page-faq .k5-fold,
  .page-faq .k5-tabs__btn,
  .page-faq .faq-support__links a {
    transition: none;
  }

  .page-faq .faq-scene:hover,
  .page-faq .faq-scene:focus-visible {
    transform: none;
  }
}
<<<END>>>