.page-faq {
  --faq-rule: 1px solid var(--c-grid);
  --faq-gap: clamp(20px, 4vw, 40px);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 22px var(--gutter) 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--c-titan);
}

.page-faq .breadcrumbs a {
  color: var(--c-ice);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-faq .breadcrumbs a:hover,
.page-faq .breadcrumbs a:focus-visible {
  color: var(--c-cyan);
}

.page-faq .breadcrumbs__sep {
  color: var(--c-grid);
}

.page-faq .breadcrumbs [aria-current="page"] {
  color: var(--c-white);
}

/* ---------- 首屏 ---------- */
.page-faq__hero {
  position: relative;
  padding: clamp(38px, 6vw, 82px) 0 clamp(34px, 5vw, 62px);
  overflow: hidden;
}

.page-faq__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(30, 58, 95, .5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 58, 95, .5) 1px, transparent 1px);
  background-size: 96px 96px;
  -webkit-mask-image: radial-gradient(circle at 82% 8%, #000 0%, transparent 64%);
  mask-image: radial-gradient(circle at 82% 8%, #000 0%, transparent 64%);
  pointer-events: none;
}

.page-faq__hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--c-cyan), rgba(255, 107, 26, .55) 62%, transparent);
  opacity: .5;
}

.faq-hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 58px);
  align-items: start;
}

.faq-hero__lead .eyebrow {
  color: var(--c-cyan);
}

.faq-hero h1 {
  margin: 16px 0 0;
  font-size: clamp(32px, 8vw, 62px);
  line-height: 1.08;
  letter-spacing: -.022em;
  font-weight: 800;
  color: var(--c-white);
  max-width: 18ch;
}

.faq-hero .lead {
  margin: 22px 0 0;
  max-width: 58ch;
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.88;
  color: var(--c-ice);
}

.faq-hero__actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.faq-hero__aside {
  border-top: 2px solid var(--c-cyan);
  padding-top: 18px;
}

.faq-hero__aside-title {
  margin: 0;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-titan);
  text-transform: uppercase;
}

.faq-jump {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
}

.faq-jump a {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 12px 12px 12px 10px;
  border-left: 2px solid transparent;
  border-bottom: var(--faq-rule);
  color: var(--c-white);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.5;
  transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.faq-jump a .mono {
  color: var(--c-titan);
  font-size: 12px;
  letter-spacing: .06em;
}

.faq-jump a:hover,
.faq-jump a:focus-visible {
  background: rgba(0, 229, 255, .07);
  border-left-color: var(--c-cyan);
  color: var(--c-cyan);
}

.faq-jump a:hover .mono,
.faq-jump a:focus-visible .mono {
  color: var(--c-orange);
}

.faq-hero__aside .version-tag {
  display: inline-block;
  margin-top: 18px;
  padding: 5px 10px;
  border: 1px solid var(--c-orange);
  color: var(--c-orange);
  font-size: 11.5px;
  letter-spacing: .08em;
}

/* ---------- 分组骨架 ---------- */
.page-faq__group {
  padding: clamp(40px, 6vw, 76px) 0;
  border-bottom: var(--faq-rule);
}

.page-faq__group:last-of-type {
  border-bottom: none;
}

.faq-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: start;
}

.faq-grid__aside .eyebrow {
  margin: 0;
  color: var(--c-cyan);
  font-size: 12px;
  letter-spacing: .1em;
}

.faq-grid__title {
  margin: 12px 0 0;
  font-size: clamp(22px, 4.4vw, 32px);
  line-height: 1.24;
  letter-spacing: -.01em;
  font-weight: 700;
  color: var(--c-white);
}

.faq-grid__note {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--c-titan);
  max-width: 30ch;
}

.faq-grid__body {
  min-width: 0;
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-accordion {
  border-bottom: var(--faq-rule);
}

.page-faq .faq-accordion__heading {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .faq-accordion__trigger {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  padding: 20px 0;
  background: none;
  border: none;
  border-top: var(--faq-rule);
  color: var(--c-white);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  text-align: left;
  cursor: pointer;
  transition: color .2s var(--ease), padding-left .2s var(--ease);
}

.page-faq .faq-accordion__trigger:hover,
.page-faq .faq-accordion__trigger:focus-visible {
  color: var(--c-cyan);
  padding-left: 6px;
}

.page-faq .faq-accordion__trigger[aria-expanded="true"] {
  color: var(--c-cyan);
}

.page-faq .faq-accordion__num {
  flex: 0 0 auto;
  padding-top: 2px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-orange);
}

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

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

.page-faq .faq-accordion__mark::before,
.page-faq .faq-accordion__mark::after {
  content: "";
  position: absolute;
  background: var(--c-cyan);
  transition: transform .25s var(--ease), opacity .25s var(--ease);
}

.page-faq .faq-accordion__mark::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 1.5px;
}

.page-faq .faq-accordion__mark::after {
  left: 6px;
  top: 0;
  width: 1.5px;
  height: 14px;
}

.page-faq .faq-accordion__trigger[aria-expanded="true"] .faq-accordion__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-accordion__body {
  padding: 0 0 22px 34px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--c-ice);
}

.page-faq .faq-accordion__body p {
  margin: 0;
  max-width: 62ch;
}

/* ---------- 图文块 ---------- */
.faq-media {
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.faq-media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: var(--faq-rule);
}

.faq-media__cap {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--c-titan);
  letter-spacing: .02em;
}

/* ---------- 索引注释条 ---------- */
.faq-annot {
  display: grid;
  gap: 14px;
  padding: 18px 20px;
  margin-bottom: 26px;
  border: var(--faq-rule);
  border-left: 2px solid var(--c-orange);
  background: rgba(0, 229, 255, .04);
}

.faq-annot__code {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: clamp(15px, 2.6vw, 19px);
  letter-spacing: .06em;
  color: var(--c-cyan);
}

.faq-annot__arrow {
  color: var(--c-orange);
}

.faq-annot__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-titan);
  max-width: 58ch;
}

/* ---------- 联系支持 ---------- */
.faq-contact {
  margin-top: 30px;
  padding: 22px 20px;
  border: var(--faq-rule);
}

.faq-contact__label {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--c-orange);
}

.faq-contact__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.faq-contact__list li {
  display: grid;
  gap: 4px;
}

.faq-contact__key {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-titan);
}

.faq-contact__val {
  font-size: 15px;
  line-height: 1.6;
  color: var(--c-white);
  word-break: break-word;
}

.faq-contact__val.mono {
  color: var(--c-cyan);
  letter-spacing: .04em;
}

.faq-contact__note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: var(--faq-rule);
  font-size: 13px;
  line-height: 1.75;
  color: var(--c-titan);
}

/* ---------- 延伸入口 ---------- */
.page-faq__more {
  padding: clamp(34px, 5vw, 58px) 0 clamp(46px, 6vw, 78px);
}

.page-faq__more .eyebrow {
  margin: 0 0 18px;
  color: var(--c-titan);
  font-size: 12px;
  letter-spacing: .12em;
}

.faq-more {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--c-grid);
  border: var(--faq-rule);
}

.faq-more li {
  background: var(--c-deep);
  padding: 18px 18px 20px;
  transition: background .2s var(--ease);
}

.faq-more li:hover {
  background: rgba(0, 229, 255, .05);
}

.faq-more a {
  display: block;
  color: var(--c-white);
  text-decoration: none;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .01em;
  transition: color .2s var(--ease);
}

.faq-more a::after {
  content: " →";
  color: var(--c-cyan);
  font-family: var(--font-mono);
  font-size: 14px;
}

.faq-more a:hover,
.faq-more a:focus-visible {
  color: var(--c-cyan);
}

.faq-more span {
  display: block;
  margin-top: 7px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-titan);
}

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

@media (min-width: 900px) {
  .faq-hero {
    grid-template-columns: minmax(0, 1.55fr) minmax(260px, .85fr);
    gap: clamp(40px, 6vw, 80px);
  }

  .faq-hero h1 {
    max-width: 16ch;
  }

  .faq-grid {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: clamp(30px, 4vw, 64px);
  }

  .faq-grid__aside {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
  }

  .page-faq .faq-accordion__trigger {
    font-size: 17px;
  }

  .faq-media {
    margin-top: 34px;
  }

  .faq-contact {
    padding: 26px 28px;
  }

  .faq-contact__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 30px;
  }

  .faq-contact__list li:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1180px) {
  .faq-grid {
    grid-template-columns: 250px minmax(0, 1fr);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-accordion__trigger,
  .page-faq .faq-accordion__mark::before,
  .page-faq .faq-accordion__mark::after,
  .faq-jump a,
  .faq-more li,
  .faq-more a {
    transition: none;
  }
}
<<<END>>>