.page-faq {
  --faq-rail: 236px;
  --faq-gap: clamp(20px, 4vw, 56px);
  --faq-line: rgba(6, 24, 38, .16);
}

/* 面包屑 */
.page-faq .faq-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mist);
  padding-bottom: 14px;
}
.page-faq .faq-crumbs .breadcrumbs__link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-faq .faq-crumbs .breadcrumbs__link:hover {
  color: var(--volt);
  border-bottom-color: var(--volt);
}
.page-faq .faq-crumbs .breadcrumbs__sep { color: var(--steel); }
.page-faq .faq-crumbs .breadcrumbs__current {
  color: var(--chalk);
  font-weight: 700;
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--night);
  color: var(--chalk);
  padding-block: clamp(20px, 3vw, 28px) clamp(36px, 6vw, 68px);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(90deg, rgba(200, 214, 197, .07) 0 1px, transparent 1px 76px),
    repeating-linear-gradient(0deg, rgba(200, 214, 197, .07) 0 1px, transparent 1px 76px),
    radial-gradient(circle at 86% 8%, rgba(11, 122, 59, .6), transparent 58%);
}
.page-faq .faq-hero__inner { position: relative; z-index: 1; }
.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  padding-top: clamp(14px, 3vw, 32px);
}
.page-faq .faq-hero__copy .kicker {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--volt);
  margin: 0 0 12px;
}
.page-faq .faq-hero__title {
  margin: 0 0 16px;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(30px, 6vw, 54px);
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--chalk);
}
.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--mist);
}
.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}
.page-faq .faq-hero__board {
  border-top: 3px solid var(--volt);
  background: linear-gradient(180deg, rgba(18, 58, 90, .6), rgba(3, 7, 10, .6));
  padding: clamp(16px, 3vw, 24px);
}
.page-faq .faq-hero__board-head {
  margin: 0 0 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--steel);
}
.page-faq .faq-stat {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--hair-light);
}
.page-faq .faq-stat:last-child { border-bottom: 0; padding-bottom: 0; }
.page-faq .faq-stat .num {
  flex: none;
  min-width: 2.6em;
  font-family: var(--font-num);
  font-size: clamp(24px, 4vw, 34px);
  line-height: 1;
  color: var(--chalk);
  letter-spacing: .02em;
}
.page-faq .faq-stat__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* 章节标题在深底/草皮底的配色 */
.page-faq .faq-start__head {
  border-bottom: 2px solid rgba(245, 247, 238, .3);
  padding-bottom: 14px;
  margin-bottom: clamp(20px, 3vw, 34px);
}
.page-faq .faq-start__head .section-head__index { color: var(--volt); }
.page-faq .faq-start__head .section-head__title { color: var(--chalk); }
.page-faq .faq-start__head .section-head__note { color: rgba(245, 247, 238, .78); }

.page-faq .faq-q__head {
  border-bottom: 2px solid var(--night);
  padding-bottom: 14px;
  margin-bottom: clamp(18px, 3vw, 30px);
}
.page-faq .faq-q__head .section-head__index { color: var(--turf); }
.page-faq .faq-q__head .section-head__title { color: var(--night); }
.page-faq .faq-q__head .section-head__note { color: var(--board); }

/* 三分钟上手 */
.page-faq .faq-start {
  padding-block: clamp(36px, 6vw, 76px);
  background: var(--turf);
  color: var(--chalk);
}
.page-faq .faq-start__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}
.page-faq .faq-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}
.page-faq .faq-step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid rgba(245, 247, 238, .28);
}
.page-faq .faq-step:first-child { border-top: 0; padding-top: 0; }
.page-faq .faq-step__num {
  font-family: var(--font-num);
  font-size: clamp(28px, 4.4vw, 40px);
  line-height: 1;
  color: var(--volt);
}
.page-faq .faq-step__title {
  margin: 0 0 6px;
  font-size: clamp(16px, 2vw, 18px);
  font-weight: 900;
  color: var(--chalk);
}
.page-faq .faq-step__text {
  margin: 0;
  max-width: 30em;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(245, 247, 238, .82);
}

/* 图片容器 */
.page-faq .faq-figure {
  margin: 0;
  max-width: 100%;
  overflow: hidden;
  position: relative;
  background: var(--board);
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
  height: auto;
}
.page-faq .faq-figure .media-frame__caption {
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--chalk);
  background: rgba(3, 7, 10, .72);
}

/* 问答区 */
.page-faq .faq-q {
  background: var(--chalk);
  color: var(--night);
  padding-block: clamp(36px, 6vw, 84px);
}
.page-faq .faq-board {
  display: grid;
  gap: clamp(16px, 3vw, 24px);
}

/* 左侧分类轨道（窄屏为横向滑动条） */
.page-faq .faq-rail { margin: 0; }
.page-faq .faq-rail__head {
  margin: 0 0 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--steel);
}
.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 10px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.page-faq .faq-rail__list > li { flex: none; }
.page-faq .faq-rail__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid var(--faq-line);
  color: var(--night);
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}
.page-faq .faq-rail__link .num {
  font-family: var(--font-num);
  font-size: 15px;
  color: var(--turf);
}
.page-faq .faq-rail__link:hover {
  border-color: var(--turf);
  color: var(--turf-deep);
}
.page-faq .faq-rail__link.is-active,
.page-faq .faq-rail__link.is-current,
.page-faq .faq-rail__link[aria-current] {
  background: var(--turf-deep);
  border-color: var(--turf-deep);
  color: var(--chalk);
}
.page-faq .faq-rail__link.is-active .num,
.page-faq .faq-rail__link.is-current .num,
.page-faq .faq-rail__link[aria-current] .num { color: var(--volt); }
.page-faq .faq-rail__jump {
  display: inline-block;
  margin-top: 4px;
  font-size: 13px;
  font-weight: 700;
  color: var(--signal);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

/* 问题组 */
.page-faq .faq-groups { min-width: 0; }
.page-faq .faq-group {
  border-top: 2px solid var(--night);
  padding-top: 14px;
  padding-bottom: clamp(18px, 3vw, 34px);
}
.page-faq .faq-group:last-child { padding-bottom: 0; }
.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 6px;
}
.page-faq .faq-group__index {
  font-family: var(--font-num);
  font-size: clamp(24px, 4vw, 36px);
  line-height: 1;
  color: var(--turf);
}
.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 900;
  color: var(--night);
  letter-spacing: -.01em;
}

/* 手风琴 */
.page-faq .qa { border-bottom: 1px solid var(--faq-line); }
.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--night);
  cursor: pointer;
  list-style: none;
}
.page-faq .qa summary::-webkit-details-marker { display: none; }
.page-faq .qa summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-num);
  font-size: 22px;
  line-height: 1;
  color: var(--turf);
}
.page-faq .qa[open] summary::after {
  content: "−";
  color: var(--signal);
}
.page-faq .qa summary:hover,
.page-faq .qa[open] summary { color: var(--turf-deep); }
.page-faq .qa__body {
  padding: 0 0 18px;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--board);
}
.page-faq .qa__body p { margin: 0 0 8px; }
.page-faq .qa__body p:last-child { margin-bottom: 0; }
.page-faq .qa__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 10px 0 0;
}
.page-faq .qa__tags .tag {
  font-size: 12px;
  padding: 3px 9px;
  border: 1px solid rgba(6, 74, 40, .35);
  color: var(--turf-deep);
  background: transparent;
}
.page-faq .qa__tags .tag--outline {
  border-color: var(--faq-line);
  color: var(--board);
}
.page-faq .qa__more { margin-top: 10px; }
.page-faq .qa__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 700;
  color: var(--turf-deep);
  text-decoration: none;
  border-bottom: 2px solid var(--volt);
  padding-bottom: 1px;
}
.page-faq .qa__link::after { content: "→"; color: var(--signal); }
.page-faq .qa__link:hover { color: var(--night); border-bottom-color: var(--signal); }

.page-faq .faq-group .faq-figure {
  margin-top: clamp(16px, 3vw, 24px);
}

/* 联系区块 */
.page-faq .faq-help {
  position: relative;
  background: var(--ink);
  color: var(--chalk);
  padding-block: clamp(36px, 6vw, 80px);
  overflow: hidden;
}
.page-faq .faq-help::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(115deg, transparent 52%, rgba(11, 122, 59, .32) 52%, rgba(11, 122, 59, .32) 66%, transparent 66%);
}
.page-faq .faq-help__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}
.page-faq .faq-help__copy .kicker {
  display: inline-block;
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--volt);
}
.page-faq .faq-help__title {
  margin: 0 0 14px;
  font-size: clamp(24px, 4.6vw, 40px);
  font-weight: 900;
  line-height: 1.2;
  color: var(--chalk);
}
.page-faq .faq-help__lede {
  margin: 0;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}
.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 3vw, 26px);
}
.page-faq .faq-help__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: clamp(16px, 3vw, 22px) 0 0;
  font-size: 13px;
}
.page-faq .faq-help__links a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid var(--hair-light);
  padding-bottom: 2px;
}
.page-faq .faq-help__links a:hover {
  color: var(--volt);
  border-bottom-color: var(--volt);
}

.page-faq .faq-contact {
  margin: 0;
  border-top: 2px solid var(--turf);
  padding-top: 6px;
}
.page-faq .faq-contact__item {
  display: grid;
  gap: 2px;
  padding: 12px 0;
  border-bottom: 1px solid var(--hair-light);
}
.page-faq .faq-contact__item:last-child { border-bottom: 0; }
.page-faq .faq-contact__label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--steel);
}
.page-faq .faq-contact__value {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--chalk);
}
.page-faq .faq-contact__value a {
  color: var(--volt);
  text-decoration: none;
  border-bottom: 1px solid rgba(216, 255, 62, .4);
  word-break: break-all;
}
.page-faq .faq-contact__value a:hover { border-bottom-color: var(--volt); }
.page-faq .faq-contact__item--note .faq-contact__value {
  font-size: 13px;
  color: var(--mist);
}

/* 平板及以上 */
@media (min-width: 720px) {
  .page-faq .faq-start__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
    align-items: start;
  }
  .page-faq .faq-contact__item {
    grid-template-columns: 8em minmax(0, 1fr);
    align-items: baseline;
    gap: 12px;
  }
  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }
}

/* 桌面：左侧固定轨道 + 右侧连续问答 */
@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .85fr);
    align-items: end;
  }
  .page-faq .faq-board {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: var(--faq-gap);
    align-items: start;
  }
  .page-faq .faq-rail {
    position: sticky;
    top: 92px;
    border-top: 3px solid var(--turf-deep);
    padding-top: 12px;
  }
  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-faq .faq-rail__list > li { width: 100%; }
  .page-faq .faq-rail__link {
    width: 100%;
    border: 0;
    border-bottom: 1px solid var(--faq-line);
    padding: 12px 0 12px 12px;
    white-space: normal;
    background: transparent;
    color: var(--night);
  }
  .page-faq .faq-rail__link:hover { color: var(--turf-deep); }
  .page-faq .faq-rail__link.is-active,
  .page-faq .faq-rail__link.is-current,
  .page-faq .faq-rail__link[aria-current] {
    background: transparent;
    border-bottom-color: var(--turf-deep);
    color: var(--turf-deep);
  }
  .page-faq .faq-rail__link.is-active::before,
  .page-faq .faq-rail__link.is-current::before,
  .page-faq .faq-rail__link[aria-current]::before {
    content: "";
    position: absolute;
    left: 0;
    top: 12px;
    bottom: 12px;
    width: 3px;
    background: var(--volt);
  }
  .page-faq .faq-rail__link.is-active .num,
  .page-faq .faq-rail__link.is-current .num,
  .page-faq .faq-rail__link[aria-current] .num { color: var(--signal); }
  .page-faq .faq-rail__jump { margin-top: 14px; }
  .page-faq .faq-rail__head { margin-bottom: 10px; }
  .page-faq .qa summary { font-size: 17px; padding: 18px 0; }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail__link,
  .page-faq .qa summary { transition: none; }
}
<<<END>>>