.page-faq {
  --faq-rail-w: 236px;
  --faq-gap: clamp(20px, 3vw, 40px);
  background: var(--ink);
  color: var(--fog);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq .crumbs {
  padding-block: clamp(14px, 2vw, 22px) clamp(4px, 1vw, 10px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  padding-block: clamp(12px, 2vw, 24px) clamp(32px, 5vw, 56px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__copy {
  max-width: 62ch;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-condensed);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 64px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  margin: 10px 0 0;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.72;
  color: var(--fog);
}

.page-faq .faq-hero__sub {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--graphite);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--graphite);
}

.page-faq .faq-hero__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 20px;
  color: var(--lime);
  margin-right: 4px;
}

.page-faq .faq-hero__figure {
  margin: 0;
}

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

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: var(--faq-gap);
  padding-top: clamp(28px, 4vw, 48px);
}

/* ---------- 任务索引 ---------- */
.page-faq .faq-rail {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-faq .faq-rail__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--graphite);
}

.page-faq .faq-rail__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
  border-left: 2px solid var(--line);
}

.page-faq .faq-rail__list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 9px 0 9px 14px;
  color: var(--fog);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.45;
  border-left: 2px solid transparent;
  margin-left: -2px;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--lime);
  border-left-color: var(--lime);
  background: var(--glass);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--amber);
  flex: none;
}

/* 三季路径侧栏 */
.page-faq .faq-rail__season {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
  padding: 12px 14px;
}

.page-faq .faq-rail__season summary {
  cursor: pointer;
  font-family: var(--font-condensed);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--fog);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

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

.page-faq .faq-rail__season summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--lime);
  font-size: 15px;
}

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

.page-faq .faq-rail__season-body {
  padding-top: 10px;
  border-top: 1px solid var(--line);
  margin-top: 10px;
}

.page-faq .faq-season__list {
  margin: 0 0 10px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 7px;
  font-size: 12.5px;
  color: var(--graphite);
}

.page-faq .faq-season__list li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-faq .faq-season__dot {
  width: 14px;
  height: 2px;
  background: var(--line-strong);
  flex: none;
}

.page-faq .faq-season__dot--on {
  background: var(--lime);
  box-shadow: 0 0 8px rgba(199, 255, 61, 0.5);
}

.page-faq .faq-rail__season-body p {
  margin: 0 0 10px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--graphite);
}

.page-faq .faq-rail__link {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

/* ---------- 问答组 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: clamp(34px, 6vw, 72px);
  min-width: 0;
}

.page-faq .faq-group,
.page-faq .faq-path,
.page-faq .faq-device,
.page-faq .faq-help {
  scroll-margin-top: calc(var(--header-h) + 18px);
}

.page-faq .faq-group__head {
  position: relative;
  padding-left: 44px;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 14px;
}

.page-faq .faq-group__num {
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-faq .faq-group__head h2 {
  font-family: var(--font-condensed);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.16;
  margin: 0;
  letter-spacing: -0.005em;
}

.page-faq .faq-group__desc {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--graphite);
  max-width: 60ch;
}

.page-faq .faq-group__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

/* 可展开条目 */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(232, 240, 234, 0.035), transparent 62%);
}

.page-faq .faq-item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 15px 4px 15px 2px;
  transition: color 0.2s ease;
}

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

.page-faq .faq-item__q {
  flex: 1;
  font-size: 15.5px;
  line-height: 1.55;
  font-weight: 500;
  color: var(--fog);
}

.page-faq .faq-item summary:hover .faq-item__q,
.page-faq .faq-item summary:focus-visible .faq-item__q {
  color: var(--lime);
}

.page-faq .faq-item__sign {
  flex: none;
  width: 22px;
  height: 22px;
  margin-top: 1px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  position: relative;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  background: var(--graphite);
  transition: transform 0.22s ease, background 0.22s ease;
}

.page-faq .faq-item__sign::before {
  left: 5px;
  right: 5px;
  top: 10px;
  height: 1.5px;
}

.page-faq .faq-item__sign::after {
  top: 5px;
  bottom: 5px;
  left: 10px;
  width: 1.5px;
}

.page-faq .faq-item[open] .faq-item__sign {
  border-color: var(--lime);
  background: rgba(199, 255, 61, 0.1);
}

.page-faq .faq-item[open] .faq-item__sign::before,
.page-faq .faq-item[open] .faq-item__sign::after {
  background: var(--lime);
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: scaleY(0);
}

.page-faq .faq-item__a {
  padding: 0 4px 18px 2px;
  max-width: 66ch;
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--graphite);
}

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

.page-faq .faq-item__a a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(54, 197, 240, 0.4);
}

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

.page-faq .faq-item__a ol {
  margin: 0 0 12px;
  padding-left: 18px;
  display: grid;
  gap: 6px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--fog);
}

.page-faq .faq-item__a ol li::marker {
  font-family: var(--font-mono);
  color: var(--amber);
  font-size: 12px;
}

/* ---------- 三季路径 ---------- */
.page-faq .faq-path {
  padding: clamp(22px, 3.4vw, 36px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(155deg, var(--deep), var(--ink) 72%);
}

.page-faq .faq-path__grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  margin-top: 18px;
}

.page-faq .faq-path__copy p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--graphite);
  max-width: 60ch;
}

.page-faq .faq-path__notes {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-faq .faq-path__notes li {
  position: relative;
  padding-left: 18px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--fog);
}

.page-faq .faq-path__notes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 9px;
  height: 2px;
  background: var(--amber);
}

.page-faq .faq-path__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 0;
  font-size: 13px;
}

.page-faq .faq-path__links a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(54, 197, 240, 0.4);
}

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

.page-faq .faq-path__board {
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-faq .faq-path__cell {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  padding: 14px 16px;
  border: 1px dashed var(--line-strong);
  border-radius: 2px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--graphite);
}

.page-faq .faq-path__cell strong {
  font-family: var(--font-condensed);
  font-size: 15px;
  letter-spacing: 0.02em;
  font-weight: 700;
  color: var(--fog);
}

.page-faq .faq-path__cell--now {
  border: 1px solid var(--lime);
  background: rgba(199, 255, 61, 0.08);
  color: var(--lime);
}

.page-faq .faq-path__cell--now strong {
  color: var(--lime);
}

/* ---------- 设备速查 ---------- */
.page-faq .faq-device__figure {
  margin: 20px 0 22px;
}

.page-faq .faq-device__figure img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: var(--radius);
}

.page-faq .faq-device__table {
  border-top: 2px solid var(--board);
  display: grid;
}

.page-faq .faq-device__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.6;
}

.page-faq .faq-device__row > span:first-child {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--graphite);
  text-transform: uppercase;
}

.page-faq .faq-device__row > span:not(:first-child) {
  color: var(--fog);
}

.page-faq .faq-device__row--head {
  display: none;
}

/* ---------- 仍需帮助 ---------- */
.page-faq .faq-help__grid {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.page-faq .faq-help__card {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  border-radius: var(--radius);
  background: var(--glass);
}

.page-faq .faq-help__label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--graphite);
}

.page-faq .faq-help__value {
  margin: 0 0 6px;
  font-family: var(--font-condensed);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--fog);
  word-break: break-word;
}

.page-faq .faq-help__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--graphite);
}

.page-faq .faq-help__template {
  margin-top: 18px;
  padding: clamp(18px, 3vw, 26px);
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  background: linear-gradient(120deg, rgba(255, 159, 28, 0.1), transparent 70%);
}

.page-faq .faq-help__template-title {
  margin: 0 0 12px;
  font-family: var(--font-condensed);
  font-size: 17px;
  font-weight: 700;
  color: var(--fog);
}

.page-faq .faq-help__template ul {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-faq .faq-help__template li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--graphite);
}

.page-faq .faq-help__template li::before {
  content: "▸";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--amber);
  font-size: 12px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: end;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-device__row {
    grid-template-columns: 128px minmax(0, 1fr) minmax(0, 1.2fr);
    align-items: start;
    padding: 14px 4px;
  }

  .page-faq .faq-device__row--head {
    display: grid;
    border-bottom: 1px solid var(--line-strong);
  }

  .page-faq .faq-device__row--head > span {
    font-family: var(--font-condensed);
    font-size: 12px !important;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--lime) !important;
    text-transform: uppercase;
  }
}

/* ---------- 桌面：固定左索引 + 右侧问答 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    align-items: start;
    gap: clamp(32px, 4vw, 64px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    max-height: calc(100vh - var(--header-h) - 40px);
    overflow-y: auto;
    padding-right: 6px;
  }

  .page-faq .faq-path__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: start;
  }

  .page-faq .faq-hero h1 {
    max-width: 15ch;
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-device__row {
    grid-template-columns: 150px minmax(0, 1fr) minmax(0, 1.15fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__sign,
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after,
  .page-faq .faq-rail__list a {
    transition: none;
  }
}

@media print {
  .page-faq .faq-rail,
  .page-faq .faq-hero__actions {
    display: none;
  }

  .page-faq {
    background: #fff;
    color: #111;
  }

  .page-faq .faq-item {
    break-inside: avoid;
  }
}
<<<END>>>