.page-faq {
  --step-w: 250px;
  --card-bg: rgba(11, 41, 66, 0.86);
  padding-bottom: clamp(40px, 6vw, 92px);
}

.page-faq .faq-crumb {
  padding-top: clamp(18px, 3vw, 32px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(20px, 3vw, 40px) 0 clamp(30px, 5vw, 64px);
}

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

.page-faq .faq-hero__main .eyebrow {
  margin: 0 0 14px;
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  max-width: 16em;
}

.page-faq .faq-hero .lead {
  margin: 0;
  max-width: 48ch;
  color: var(--mist);
}

.page-faq .faq-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 30px);
}

.page-faq .faq-hero__side {
  border: 1px solid var(--line);
  background: linear-gradient(165deg, rgba(27, 106, 147, 0.42), rgba(11, 41, 66, 0.9) 58%, rgba(6, 26, 46, 0.96));
  padding: clamp(18px, 3vw, 26px);
}

.page-faq .faq-hero__side-title {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--neon);
}

.page-faq .faq-hero__index {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-hero__index a {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 11px 2px;
  border-bottom: 1px solid var(--line);
  color: var(--foam);
  font-size: 15px;
  text-decoration: none;
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.page-faq .faq-hero__index a:hover,
.page-faq .faq-hero__index a:focus-visible {
  color: var(--coral);
  padding-left: 8px;
}

.page-faq .faq-hero__index .num {
  color: var(--coral);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-faq .faq-hero__side-note {
  margin: 16px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 通用章节 ---------- */
.page-faq .faq-section {
  padding: clamp(36px, 5vw, 72px) 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(22px, 3vw, 38px);
}

.page-faq .faq-head__no {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--coral);
}

.page-faq .faq-head h2 {
  margin: 0;
}

.page-faq .faq-head__text {
  margin: 0;
  max-width: 62ch;
  color: var(--mist);
  line-height: 1.75;
}

/* ---------- 步骤切换 ---------- */
.page-faq .guide-tabs {
  display: grid;
  gap: 18px;
}

.page-faq .step-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-faq .step-rail__btn {
  flex: 0 0 auto;
  min-width: 168px;
  display: grid;
  gap: 3px;
  padding: 12px 14px;
  font: inherit;
  text-align: left;
  border: 1px solid var(--line);
  border-radius: 0;
  background: rgba(11, 41, 66, 0.6);
  color: var(--mist);
  cursor: pointer;
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease), color 0.22s var(--ease);
}

.page-faq .step-rail__btn:hover {
  border-color: var(--line-strong);
  color: var(--foam);
}

.page-faq .step-rail__btn:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 2px;
}

.page-faq .step-rail__no {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--steel);
}

.page-faq .step-rail__label {
  font-size: 15px;
  font-weight: 700;
}

.page-faq .step-rail__hint {
  font-size: 11.5px;
  color: var(--steel);
}

.page-faq .step-rail__btn[aria-selected="true"] {
  color: var(--foam);
  border-color: rgba(255, 107, 74, 0.65);
  background: linear-gradient(120deg, rgba(255, 107, 74, 0.18), rgba(11, 41, 66, 0.78));
  box-shadow: inset 3px 0 0 var(--coral);
}

.page-faq .step-rail__btn[aria-selected="true"] .step-rail__no {
  color: var(--coral);
}

.page-faq .step-stack {
  display: grid;
  gap: 14px;
}

.page-faq .step-card {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--card-bg), rgba(6, 26, 46, 0.95));
  padding: clamp(18px, 2.6vw, 32px);
}

.page-faq .step-card:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 2px;
}

.page-faq .step-card__top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.page-faq .step-card__badge {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--coral);
}

.page-faq .step-card h3 {
  margin: 0 0 12px;
  font-size: clamp(20px, 2.2vw, 27px);
  line-height: 1.35;
}

.page-faq .step-card p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .step-card__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .step-card__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--foam);
}

.page-faq .step-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 8px;
  height: 1px;
  background: var(--steel);
}

.page-faq .step-card__gain {
  margin: 0;
  padding: 12px 14px;
  border-left: 2px solid var(--neon);
  background: rgba(53, 240, 192, 0.06);
  color: var(--foam) !important;
  font-size: 14.5px !important;
}

.page-faq .step-card__gain strong {
  color: var(--neon);
  font-weight: 700;
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: clamp(22px, 3vw, 36px) 0 0;
  border: 1px solid var(--line);
  background: rgba(11, 41, 66, 0.5);
}

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

.page-faq .faq-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--mist);
}

/* ---------- 筛选与对照 ---------- */
.page-faq .filter-grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-faq .filter-main h3 {
  margin: 0 0 12px;
  font-size: clamp(20px, 2.2vw, 26px);
}

.page-faq .filter-main p {
  margin: 0 0 18px;
  color: var(--mist);
  line-height: 1.75;
}

.page-faq .filter-order {
  list-style: none;
  counter-reset: fo;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .filter-order li {
  counter-increment: fo;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  font-size: 15px;
  color: var(--foam);
}

.page-faq .filter-order li::before {
  content: "0" counter(fo);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--coral);
}

.page-faq .filter-order span {
  display: block;
  margin-top: 4px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--mist);
}

.page-faq .filter-board {
  border: 1px solid var(--line);
  background: linear-gradient(200deg, rgba(27, 106, 147, 0.28), rgba(11, 41, 66, 0.88));
  padding: clamp(16px, 2.4vw, 24px);
}

.page-faq .filter-board__title {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--neon);
}

.page-faq .field-wall {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .field-wall li {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 12px;
  background: rgba(6, 26, 46, 0.92);
  font-size: 13.5px;
  color: var(--foam);
}

.page-faq .field-wall .num {
  font-size: 11px;
  color: var(--steel);
}

.page-faq .filter-board__note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .view-modes {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.page-faq .view-modes li {
  border: 1px solid var(--line);
  background: rgba(11, 41, 66, 0.55);
  padding: 16px 18px;
}

.page-faq .view-modes h4 {
  margin: 0 0 6px;
  font-size: 15px;
  color: var(--foam);
}

.page-faq .view-modes p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 订阅步骤 ---------- */
.page-faq .subscribe-steps {
  list-style: none;
  counter-reset: ss;
  margin: 0;
  padding: 0;
}

.page-faq .subscribe-steps li {
  counter-increment: ss;
  position: relative;
  padding: 18px 0 18px 52px;
  border-bottom: 1px solid var(--line);
}

.page-faq .subscribe-steps li::before {
  content: counter(ss, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 22px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--coral);
}

.page-faq .subscribe-steps h3 {
  margin: 0 0 6px;
  font-size: 16.5px;
  color: var(--foam);
}

.page-faq .subscribe-steps p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .subscribe-note {
  margin: 20px 0 0;
  padding: 14px 16px;
  border: 1px solid rgba(53, 240, 192, 0.35);
  background: rgba(53, 240, 192, 0.07);
  font-size: 14px;
  line-height: 1.7;
  color: var(--foam);
}

/* ---------- 跨端同步 ---------- */
.page-faq .sync-grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-faq .sync-check__title {
  margin: 0 0 14px;
  font-size: 16px;
  color: var(--foam);
}

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

.page-faq .sync-check li {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 13px 15px;
  border: 1px solid var(--line);
  background: rgba(11, 41, 66, 0.62);
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--foam);
}

.page-faq .sync-check .ck {
  display: block;
  width: 16px;
  height: 16px;
  margin-top: 2px;
  border: 1px solid var(--neon);
  position: relative;
}

.page-faq .sync-check .ck::after {
  content: "";
  position: absolute;
  left: 3px;
  top: 3px;
  width: 8px;
  height: 8px;
  background: var(--neon);
}

.page-faq .sync-check small {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--mist);
}

.page-faq .sync-check__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-figure--sync {
  margin: 0;
}

/* ---------- 问答分类 ---------- */
.page-faq .qa-tabs {
  display: grid;
  gap: 18px;
}

.page-faq .qa-cats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .qa-cats button {
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  color: var(--mist);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .qa-cats button:hover {
  color: var(--foam);
  border-color: var(--line-strong);
}

.page-faq .qa-cats button:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 2px;
}

.page-faq .qa-cats button[aria-selected="true"] {
  background: var(--coral);
  border-color: var(--coral);
  color: #21100b;
  font-weight: 700;
}

.page-faq .qa-panel {
  display: grid;
  gap: 10px;
}

.page-faq .qa-panel details {
  border: 1px solid var(--line);
  background: rgba(11, 41, 66, 0.58);
  transition: border-color 0.2s var(--ease);
}

.page-faq .qa-panel details[open] {
  border-color: rgba(255, 107, 74, 0.42);
}

.page-faq .qa-panel summary {
  position: relative;
  padding: 15px 46px 15px 16px;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--foam);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa-panel summary:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: -2px;
}

.page-faq .qa-panel summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 18px;
  color: var(--coral);
}

.page-faq .qa-panel details[open] summary::after {
  content: "–";
}

.page-faq .qa-panel details p {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 联系 ---------- */
.page-faq .support-card {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  padding: clamp(20px, 3vw, 36px);
  border: 1px solid rgba(255, 107, 74, 0.38);
  background: linear-gradient(135deg, rgba(255, 107, 74, 0.13), rgba(11, 41, 66, 0.92) 55%);
}

.page-faq .support-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-faq .support-list li {
  display: grid;
  gap: 3px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .support-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .support-list .key {
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-faq .support-list .val {
  font-size: 17px;
  line-height: 1.5;
  color: var(--foam);
  word-break: break-word;
}

.page-faq .support-side__text {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--foam);
}

.page-faq .support-side__note {
  margin: 0 0 18px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .support-side__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 断点 ---------- */
@media (min-width: 880px) {
  .page-faq .guide-tabs {
    grid-template-columns: var(--step-w) minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

  .page-faq .step-rail {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    position: sticky;
    top: 24px;
  }

  .page-faq .step-rail__btn {
    min-width: 0;
    width: 100%;
  }

  .page-faq .step-stack {
    gap: 18px;
  }

  .page-faq .support-card {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(28px, 4vw, 52px);
    align-items: end;
  }

  .page-faq .filter-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-faq .sync-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-faq .field-wall {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .view-modes {
    gap: 14px;
  }
}

@media (max-width: 560px) {
  .page-faq .step-rail__btn {
    min-width: 148px;
  }

  .page-faq .field-wall {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .filter-order li {
    grid-template-columns: 28px minmax(0, 1fr);
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero__index a,
  .page-faq .step-rail__btn,
  .page-faq .qa-cats button,
  .page-faq .qa-panel details {
    transition: none;
  }
}
<<<END>>>