.page-faq {
  --faq-gap: clamp(20px, 3.2vw, 36px);
  padding-bottom: clamp(56px, 8vw, 104px);
  color: var(--text-ice);
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 44px) 0 clamp(28px, 4vw, 52px);
  border-bottom: 1px solid var(--line-steel);
  background:
    radial-gradient(120% 140% at 88% -10%, rgba(56, 242, 224, 0.10), transparent 55%),
    radial-gradient(90% 120% at 0% 110%, rgba(123, 97, 255, 0.12), transparent 60%),
    var(--ink-void);
}

.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: 64px 64px;
  opacity: 0.16;
  pointer-events: none;
}

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

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(18px, 3vw, 32px);
}

.page-faq .faq-hero__kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-cyan);
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5vw, 54px);
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--text-ice);
}

.page-faq .faq-hero__lead {
  margin: 16px 0 0;
  max-width: 48ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-mist);
}

.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  border: 1px solid var(--line-steel);
  background: rgba(11, 18, 32, 0.72);
  color: var(--text-ice);
  font-size: 13px;
  line-height: 1;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-chip__n {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--accent-orange);
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  background: rgba(56, 242, 224, 0.08);
}

/* 首屏右侧入口面板 */
.page-faq .faq-panel {
  padding: 16px 18px 18px;
  border: 1px solid var(--line-steel);
  background:
    linear-gradient(160deg, rgba(56, 242, 224, 0.06), transparent 45%),
    var(--ink-console);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}

.page-faq .faq-panel__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-mist);
}

.page-faq .faq-panel__title::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--accent-cyan);
}

.page-faq .faq-panel__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-panel__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 2px;
  border-bottom: 1px solid rgba(34, 48, 74, 0.7);
  color: var(--text-ice);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

.page-faq .faq-panel__idx {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--accent-cyan);
}

.page-faq .faq-panel__note {
  margin: 14px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-mist);
}

/* ---------- 正文区 ---------- */
.page-faq .faq-body {
  padding-top: clamp(28px, 4vw, 52px);
}

.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-index__label {
  margin: 0;
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-mist);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 7px 0 7px 12px;
  border-left: 2px solid transparent;
  color: var(--text-mist);
  font-size: 13.5px;
  line-height: 1.5;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--accent-orange);
}

/* 章节 */
.page-faq .faq-section {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-faq .faq-section + .faq-section {
  margin-top: clamp(34px, 5vw, 58px);
}

.page-faq .faq-section__head {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-steel);
}

.page-faq .faq-section__kicker {
  margin: 0;
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-orange);
}

.page-faq .faq-section__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 2.8vw, 30px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text-ice);
}

.page-faq .faq-section__lead {
  margin: 8px 0 0;
  max-width: 60ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-mist);
}

/* 配图 */
.page-faq .faq-figure {
  margin: 18px 0 0;
  border: 1px solid var(--line-steel);
  background: var(--ink-console);
}

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

.page-faq .faq-figure figcaption {
  padding: 8px 12px;
  border-top: 1px solid var(--line-steel);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--text-mist);
}

/* 问答折叠 */
.page-faq .qa-list {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.page-faq .qa {
  border: 1px solid var(--line-steel);
  background: var(--ink-console);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .qa:hover {
  border-color: rgba(56, 242, 224, 0.32);
}

.page-faq .qa[open] {
  border-color: rgba(56, 242, 224, 0.45);
  background:
    linear-gradient(180deg, rgba(56, 242, 224, 0.06), transparent 42%),
    var(--ink-console);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text-ice);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .qa__q::marker {
  content: "";
}

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

.page-faq .qa__q-text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa__icon {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 5px;
  margin-left: auto;
}

.page-faq .qa__icon::before,
.page-faq .qa__icon::after {
  content: "";
  position: absolute;
  background: var(--accent-cyan);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .qa__icon::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-faq .qa__icon::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
}

.page-faq .qa[open] .qa__icon::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa__a {
  padding: 0 16px 16px;
}

.page-faq .qa__a p {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-mist);
}

.page-faq .qa__a p + p {
  margin-top: 10px;
}

.page-faq .qa__a strong {
  color: var(--text-ice);
  font-weight: 600;
}

.page-faq .qa__a a {
  color: var(--accent-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 242, 224, 0.42);
  transition: border-color var(--dur) var(--ease);
}

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

.page-faq .qa__list {
  margin: 12px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-mist);
}

.page-faq .qa__list li::marker {
  color: var(--accent-cyan);
}

/* 联系支持 */
.page-faq .faq-support {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 18px;
}

.page-faq .faq-support__item {
  padding: 14px 16px;
  border: 1px solid var(--line-steel);
  background:
    linear-gradient(150deg, rgba(255, 122, 26, 0.07), transparent 55%),
    var(--ink-console);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-faq .faq-support__k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-mist);
}

.page-faq .faq-support__v {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--text-ice);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-faq .faq-support__link {
  color: var(--accent-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 242, 224, 0.42);
}

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

.page-faq .faq-support__tail {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-mist);
}

.page-faq .faq-support__tail a {
  color: var(--accent-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 242, 224, 0.42);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-support {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-support__item--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 218px minmax(0, 1fr);
    gap: clamp(30px, 4vw, 56px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-faq .qa__q {
    padding: 16px 20px;
    font-size: 16px;
  }

  .page-faq .qa__a {
    padding: 0 20px 18px;
    padding-left: 20px;
  }
}

@media (max-width: 480px) {
  .page-faq .qa__q {
    padding: 13px 13px;
    font-size: 14.5px;
  }

  .page-faq .qa__a {
    padding: 0 13px 14px;
  }

  .page-faq .faq-chip {
    font-size: 12.5px;
    padding: 6px 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__q,
  .page-faq .qa__icon::before,
  .page-faq .qa__icon::after,
  .page-faq .faq-chip,
  .page-faq .faq-panel__link,
  .page-faq .faq-index__link {
    transition: none;
  }
}
<<<END>>>