.page-faq {
  background: var(--arena);
  color: var(--fog);
}

.page-faq .mono {
  font-family: var(--font-mono);
}

/* 面包屑 */
.page-faq .breadcrumbs {
  padding: clamp(14px, 3vw, 24px) 0 0;
}

.page-faq .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
  color: var(--muted);
}

.page-faq .breadcrumbs__list li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--hairline-strong);
}

.page-faq .breadcrumbs__list a {
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

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

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 84% -12%, rgba(43, 224, 194, 0.16), transparent 62%),
    var(--carbon);
  border-bottom: 1px solid var(--hairline);
  padding: clamp(30px, 6vw, 68px) 0 clamp(36px, 7vw, 72px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    116deg,
    transparent 0 22px,
    rgba(184, 198, 193, 0.05) 22px 23px
  );
  pointer-events: none;
}

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

.page-faq .faq-hero__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 18ch;
  font-family: var(--font-display);
  font-size: clamp(30px, 7vw, 54px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--fog);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.8;
  color: var(--silver);
}

.page-faq .faq-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: clamp(28px, 5vw, 44px);
}

.page-faq .faq-step-tile {
  display: block;
  padding: 18px 20px 22px;
  background: rgba(29, 43, 38, 0.9);
  border: 1px solid var(--hairline);
  border-top: 2px solid var(--cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-faq .faq-step-tile__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(44px, 10vw, 72px);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.05em;
  color: var(--cyan);
  margin-bottom: 14px;
}

.page-faq .faq-step-tile__title {
  display: block;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--fog);
}

.page-faq .faq-step-tile__note {
  display: block;
  margin-top: 6px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* 主体栅格 */
.page-faq .faq-body {
  padding: clamp(32px, 6vw, 76px) 0 clamp(44px, 8vw, 96px);
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

/* 侧栏目录 */
.page-faq .faq-side {
  padding: 18px 18px 20px;
  background: rgba(29, 43, 38, 0.6);
  border: 1px solid var(--hairline);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-faq .faq-side__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-side__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-side__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 8px;
  font-size: 14px;
  color: var(--silver);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease), background var(--fast) var(--ease);
}

.page-faq .faq-side__list a:hover,
.page-faq .faq-side__list a:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: var(--cyan-wash);
}

.page-faq .faq-side__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}

/* 内容区段落节奏 */
.page-faq .faq-sec {
  margin-top: 34px;
  padding-top: 34px;
  border-top: 1px solid var(--hairline);
  scroll-margin-top: 24px;
}

.page-faq .faq-content > .faq-sec:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-sec h2 {
  margin: 0 0 16px;
  padding-left: 14px;
  border-left: 3px solid var(--cyan);
  font-family: var(--font-display);
  font-size: clamp(22px, 4.4vw, 31px);
  font-weight: 700;
  line-height: 1.22;
  color: var(--fog);
}

.page-faq .faq-sec h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.6vw, 20px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--fog);
}

.page-faq .faq-sec p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--silver);
}

.page-faq .faq-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 224, 194, 0.45);
  transition: border-color var(--fast) var(--ease);
}

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

/* 三步走 + 图 */
.page-faq .faq-steps-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 20px;
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-steps__item {
  padding: 18px 20px 20px;
  background: var(--panel);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--cyan-deep);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-faq .faq-steps__num {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-steps__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--silver);
}

.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--hairline);
  background: var(--carbon);
}

.page-faq .faq-figure__frame {
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.92) brightness(0.88);
}

.page-faq .faq-figure figcaption {
  padding: 12px 16px 16px;
  border-top: 1px solid var(--hairline);
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-figure--wide {
  margin-top: 22px;
}

/* 订阅收藏面板 */
.page-faq .faq-panels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 18px;
}

.page-faq .faq-panel {
  padding: 18px 20px 20px;
  background: var(--panel);
  border: 1px solid var(--hairline);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-faq .faq-panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--silver);
}

/* 要点列表 */
.page-faq .faq-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-list li {
  position: relative;
  padding-left: 24px;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--silver);
}

.page-faq .faq-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.74em;
  width: 10px;
  height: 2px;
  background: var(--cyan);
  transform: skewX(-24deg);
}

/* 折叠问答 */
.page-faq .faq-qa {
  margin-top: 18px;
  border-top: 1px solid var(--hairline);
}

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

.page-faq .faq-qa__item summary {
  display: block;
  position: relative;
  padding: 16px 44px 16px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: clamp(16px, 2.4vw, 18px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--fog);
  transition: color var(--fast) var(--ease);
}

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

.page-faq .faq-qa__item summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-qa__item[open] summary::after {
  content: "−";
}

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

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

.page-faq .faq-qa__body {
  padding: 0 0 18px;
}

.page-faq .faq-qa__body p {
  margin: 0 0 10px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--silver);
}

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

/* 联系支持 */
.page-faq .faq-support {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 18px;
}

.page-faq .faq-support__card {
  padding: 20px;
  background: linear-gradient(150deg, rgba(29, 43, 38, 0.96), rgba(16, 20, 22, 0.96));
  border: 1px solid var(--hairline-strong);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-faq .faq-support .faq-support__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-support__value {
  display: inline-block;
  font-size: clamp(16px, 3vw, 19px);
  color: var(--cyan);
  text-decoration: none;
  word-break: break-all;
  border-bottom: 1px solid rgba(43, 224, 194, 0.42);
  transition: border-color var(--fast) var(--ease);
}

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

.page-faq .faq-support .faq-support__note {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--muted);
}

.page-faq .faq-support__more {
  margin: 22px 0 0;
}

/* 平板及以上 */
@media (min-width: 640px) {
  .page-faq .faq-hero__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-faq .faq-steps-wrap {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    gap: 28px;
    align-items: start;
  }

  .page-faq .faq-figure--wide {
    max-width: 100%;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body__grid {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 68px);
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: 24px;
    align-self: start;
  }

  .page-faq .faq-sec h2 {
    font-size: 31px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .breadcrumbs__list a,
  .page-faq .faq-side__list a,
  .page-faq .faq-qa__item summary,
  .page-faq .faq-inline-link,
  .page-faq .faq-support__value {
    transition: none;
  }
}
<<<END>>>