.page-faq {
  --faq-idx-w: 232px;
  --faq-arc: 26px;
  padding-bottom: clamp(40px, 7vw, 88px);
}

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

/* 面包屑 */
.page-faq .faq-crumb {
  padding-top: clamp(14px, 2.4vw, 26px);
}
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--cool);
}
.page-faq .breadcrumb a {
  color: var(--cool);
  text-decoration: none;
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--cyan);
}
.page-faq .breadcrumb [aria-current="page"] {
  color: var(--paper);
}

/* 首屏 */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(20px, 4vw, 40px);
  padding-top: clamp(16px, 3vw, 34px);
  padding-bottom: clamp(24px, 4.5vw, 56px);
}
.page-faq .faq-kicker {
  display: inline-block;
  margin: 0 0 14px;
  padding: 4px 9px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
}
.page-faq h1 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-stretch: 85%;
  font-size: clamp(30px, 6.6vw, 60px);
  line-height: 1.08;
  letter-spacing: .005em;
  color: var(--paper);
}
.page-faq .faq-hero .lead {
  margin: 0;
  max-width: 36em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--cool);
}
.page-faq .faq-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .faq-hero__panel {
  position: relative;
  overflow: hidden;
  padding: clamp(18px, 3vw, 26px);
  background: linear-gradient(155deg, rgba(30, 58, 48, .96), rgba(43, 51, 49, .9));
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-arc)), calc(100% - var(--faq-arc)) 100%, 0 100%);
}
.page-faq .faq-hero__panel::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(63, 240, 196, .2), transparent 70%);
  pointer-events: none;
}
.page-faq .faq-hero__ph {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cool);
}
.page-faq .faq-hero__big {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(46px, 11vw, 76px);
  line-height: .95;
  letter-spacing: -.02em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}
.page-faq .faq-hero__big span {
  font-size: .26em;
  letter-spacing: .12em;
  margin-left: 8px;
  opacity: .75;
}
.page-faq .faq-hero__note {
  position: relative;
  z-index: 1;
  margin: 12px 0 0;
  max-width: 30em;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--cool);
}
.page-faq .faq-hero__ticks {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  margin: 16px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line-soft);
  list-style: none;
  font-size: 12px;
  letter-spacing: .03em;
  color: var(--cool);
}
.page-faq .faq-hero__ticks b {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--lime);
  margin-right: 5px;
}

/* 外壳：分类索引 + 问答流 */
.page-faq .faq-shell {
  display: grid;
  gap: 24px;
}

.page-faq .faq-idx {
  position: sticky;
  top: var(--topbar-h);
  z-index: 6;
  margin-inline: calc(var(--gut) * -1);
  padding: 10px var(--gut);
  overflow-x: auto;
  scrollbar-width: none;
  background: rgba(11, 26, 22, .94);
  border-bottom: 1px solid var(--line-soft);
}
.page-faq .faq-idx::-webkit-scrollbar {
  display: none;
}
.page-faq .faq-idx__title {
  display: none;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cool);
}
.page-faq .faq-idx__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-idx__link {
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 44px;
  padding: 8px 12px;
  border-left: 3px solid transparent;
  font-size: 13.5px;
  white-space: nowrap;
  color: var(--cool);
  text-decoration: none;
  transition: color .2s var(--ease), background-color .2s var(--ease), border-color .2s var(--ease);
}
.page-faq .faq-idx__num {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  color: rgba(63, 240, 196, .6);
}
.page-faq .faq-idx__link:hover,
.page-faq .faq-idx__link:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(63, 240, 196, .07);
}
.page-faq .faq-idx__cta {
  display: none;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  color: var(--cyan);
  text-decoration: none;
}

/* 问答区块 */
.page-faq .faq-sec {
  padding: clamp(26px, 4vw, 46px) 0;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--topbar-h) + 64px);
}
.page-faq .faq-flow > .faq-sec:first-child {
  border-top: 0;
  padding-top: clamp(18px, 3vw, 30px);
}
.page-faq .faq-sec__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(16px, 2.4vw, 24px);
}
.page-faq .faq-sec__num {
  justify-self: start;
  padding: 3px 9px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--cyan);
}
.page-faq h2 {
  margin: 0;
  font-family: var(--font-display);
  font-stretch: 88%;
  font-size: clamp(24px, 3.8vw, 36px);
  line-height: 1.16;
  letter-spacing: .01em;
  color: var(--paper);
}
.page-faq .faq-sec__head p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--cool);
}
.page-faq .faq-sec__more {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--cool);
}
.page-faq .faq-sec__more a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 240, 196, .38);
  padding-bottom: 1px;
}
.page-faq .faq-sec__more a:hover,
.page-faq .faq-sec__more a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* 三步上手 */
.page-faq .faq-path {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 0 14px;
}
.page-faq .faq-steps {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-step {
  padding: 18px 18px 20px;
  background: rgba(30, 58, 48, .55);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}
.page-faq .faq-step__n {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  color: var(--orange);
}
.page-faq .faq-step h3 {
  margin: 0 0 8px;
  font-size: 16.5px;
  line-height: 1.4;
  color: var(--paper);
}
.page-faq .faq-step p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--cool);
}

/* 配图 */
.page-faq .faq-figure {
  margin: 0 0 20px;
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line-soft);
  object-fit: cover;
  background: var(--rock);
}
.page-faq .faq-figure--band {
  margin-top: 4px;
}
.page-faq .media__caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--cool);
}

/* 折叠问答 */
.page-faq .qa {
  margin-bottom: 8px;
  background: rgba(43, 51, 49, .38);
  border: 1px solid var(--line-soft);
  border-left: 3px solid transparent;
  transition: background-color .24s var(--ease), border-color .24s var(--ease);
}
.page-faq .qa:last-child {
  margin-bottom: 0;
}
.page-faq .qa[open] {
  background: var(--moss);
  border-color: var(--line);
  border-left-color: var(--cyan);
}
.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-height: 48px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
  transition: color .2s var(--ease);
}
.page-faq .qa__q::-webkit-details-marker {
  display: none;
}
.page-faq .qa__q:hover {
  color: var(--cyan);
}
.page-faq .qa__icon {
  position: relative;
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
  margin-top: 3px;
}
.page-faq .qa__icon::before,
.page-faq .qa__icon::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  border-radius: 1px;
  transition: transform .24s var(--ease), opacity .24s var(--ease);
}
.page-faq .qa__icon::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}
.page-faq .qa__icon::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
}
.page-faq .qa[open] .qa__icon::after {
  transform: rotate(90deg);
  opacity: 0;
}
.page-faq .qa__a {
  padding: 0 18px 16px 46px;
}
.page-faq .qa__a p {
  margin: 0;
  max-width: 38em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--cool);
}
.page-faq .qa__a code {
  font-family: var(--font-mono);
  font-size: .92em;
  padding: 1px 6px;
  color: var(--lime);
  background: rgba(169, 182, 177, .13);
}

/* 反馈模板 */
.page-faq .faq-tpl {
  margin-bottom: 22px;
}
.page-faq .faq-tpl__body {
  margin: 0 0 12px;
  padding: 14px 16px;
  overflow-x: auto;
  border-left: 3px solid var(--orange);
  background: rgba(5, 16, 13, .6);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--paper);
  white-space: pre-wrap;
  word-break: break-word;
}

/* 联系方式 */
.page-faq .faq-contact {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}
.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-soft);
}
.page-faq .faq-contact__k {
  flex: 0 0 84px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cool);
}
.page-faq .faq-contact__v {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}
.page-faq .faq-copy {
  flex: 0 0 auto;
  min-height: 32px;
  padding: 4px 12px;
  border: 1px solid var(--line);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--cyan);
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease);
}
.page-faq .faq-copy:hover {
  background: rgba(63, 240, 196, .12);
}

/* 中屏 */
@media (min-width: 700px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }
  .page-faq .qa__a {
    padding-left: 46px;
  }
}

/* 宽屏：左右分栏，索引固定在左侧 */
@media (min-width: 1024px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr);
    align-items: end;
    gap: 44px;
  }
  .page-faq .faq-hero__panel {
    align-self: stretch;
  }
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-idx-w) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }
  .page-faq .faq-idx {
    top: calc(var(--topbar-h) + 20px);
    margin-inline: 0;
    padding: 20px 18px;
    overflow: visible;
    background: rgba(30, 58, 48, .45);
    border: 1px solid var(--line-soft);
    border-bottom: 1px solid var(--line-soft);
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  }
  .page-faq .faq-idx__title {
    display: block;
  }
  .page-faq .faq-idx__list {
    flex-direction: column;
    gap: 2px;
  }
  .page-faq .faq-idx__link {
    white-space: normal;
    padding: 10px 10px;
    line-height: 1.4;
  }
  .page-faq .faq-idx__cta {
    display: block;
  }
  .page-faq .faq-sec {
    scroll-margin-top: 96px;
  }
  .page-faq .qa__a p {
    max-width: 42em;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-shell {
    gap: 64px;
  }
}

@media (max-width: 480px) {
  .page-faq .qa__a {
    padding-left: 16px;
  }
  .page-faq .faq-contact__k {
    flex-basis: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__icon::before,
  .page-faq .qa__icon::after,
  .page-faq .faq-idx__link,
  .page-faq .faq-copy,
  .page-faq .qa__q {
    transition: none;
  }
  .page-faq .qa[open] .qa__icon::after {
    transform: none;
  }
}
<<<END>>>