.page-faq {
  display: block;
  background: var(--paper);
  overflow-x: hidden;
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

.page-faq .faq-crumb {
  padding-top: 22px;
  padding-bottom: 2px;
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  padding-top: 24px;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 26px;
  min-width: 0;
}

.page-faq .faq-hero__lead {
  min-width: 0;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 8vw, 54px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 14px 0 0;
}

.page-faq .faq-hero .lede {
  margin: 16px 0 0;
  max-width: 46ch;
  color: var(--slate);
}

.page-faq .faq-jump {
  background: var(--navy);
  padding: 22px 22px 16px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-faq .faq-jump__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--gold);
}

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

.page-faq .faq-jump__item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 0;
  border-top: 1px solid rgba(251, 248, 244, 0.16);
  color: var(--paper);
  text-decoration: none;
  font-size: 15px;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-jump__item:hover,
.page-faq .faq-jump__item:focus-visible {
  color: var(--gold);
  transform: translateX(4px);
}

.page-faq .faq-jump__no {
  font-size: 12px;
  color: var(--gold);
}

.page-faq .faq-jump__text {
  min-width: 0;
}

/* ============ 区块头 ============ */
.page-faq .faq-block {
  scroll-margin-top: 84px;
}

.page-faq .faq-head {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--fog);
  margin-bottom: 28px;
}

.page-faq .faq-head__body {
  min-width: 0;
}

.page-faq .faq-head h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 5vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--navy);
  margin: 0;
}

.page-faq .faq-sub {
  margin: 10px 0 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .faq-block:target .section-no {
  color: var(--gold);
}

/* ============ 01 双栏 ============ */
.page-faq .faq-split {
  display: grid;
  gap: 26px;
  min-width: 0;
}

.page-faq .faq-split__main,
.page-faq .faq-split__aside {
  min-width: 0;
}

.page-faq .faq-split__aside {
  border-top: 3px solid var(--gold);
  padding-top: 14px;
}

/* ---- 质保分层条 ---- */
.page-faq .tier-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .tier {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 18px 16px 18px 24px;
  background: var(--paper);
  border: 1px solid var(--fog);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .tier::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--fog);
  transition: background var(--dur) var(--ease);
}

.page-faq .tier--core::before {
  background: var(--gold);
}

.page-faq .tier--part::before {
  background: var(--clay);
}

.page-faq .tier:hover,
.page-faq .tier:focus-within {
  background: var(--sand);
  border-color: var(--gold-line);
}

.page-faq .tier:hover::before,
.page-faq .tier:focus-within::before {
  background: var(--red);
}

.page-faq .tier__body {
  min-width: 0;
}

.page-faq .tier__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--slate);
}

.page-faq .tier__desc {
  margin: 7px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .tier__len {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 22px;
  line-height: 1;
  color: var(--navy);
  white-space: nowrap;
  transition: color var(--dur) var(--ease);
}

.page-faq .tier:hover .tier__len,
.page-faq .tier:focus-within .tier__len {
  color: var(--red);
}

/* ============ 折叠问答 ============ */
.page-faq .qa-list {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.page-faq .qa {
  background: var(--paper);
  border: 1px solid var(--fog);
  border-left: 3px solid var(--fog);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .qa:hover {
  border-color: var(--gold-line);
  border-left-color: var(--gold);
}

.page-faq .qa[open] {
  background: var(--sand);
  border-left-color: var(--gold);
}

.page-faq .qa__q {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 14px;
  gap: 10px;
  align-items: start;
  padding: 16px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.6;
  color: var(--navy);
}

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

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: -2px;
}

.page-faq .qa__no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--red);
  padding-top: 4px;
}

.page-faq .qa__text {
  min-width: 0;
}

.page-faq .qa__mark {
  position: relative;
  width: 12px;
  height: 12px;
  margin-top: 6px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--navy);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .qa__mark::before {
  left: 0;
  top: 5px;
  width: 12px;
  height: 2px;
}

.page-faq .qa__mark::after {
  left: 5px;
  top: 0;
  width: 2px;
  height: 12px;
}

.page-faq .qa[open] .qa__mark::before {
  background: var(--red);
}

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

.page-faq .qa__a {
  padding: 0 18px 18px 60px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--slate);
}

.page-faq .qa__a p {
  margin: 0;
}

.page-faq .qa[open] .qa__a {
  animation: faqAnswerIn var(--dur) var(--ease) both;
}

@keyframes faqAnswerIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ============ 02 季度更新 ============ */
.page-faq .revision-panel {
  padding: 26px 20px;
}

.page-faq .revision-panel__lead {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.65;
  color: var(--navy);
}

.page-faq .revision-panel__when {
  margin: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--red);
}

.page-faq .revision-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .revision-list__item {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .revision-list__dot {
  width: 12px;
  height: 2px;
  margin-top: 12px;
  background: var(--gold);
}

/* ============ 03 库存状态 ============ */
.page-faq .stock-figure {
  margin: 0 0 26px;
  border-bottom: 2px solid var(--gold-line);
}

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

.page-faq .stock-row {
  display: grid;
  gap: 10px;
  padding: 18px;
  background: var(--paper);
  border: 1px solid var(--fog);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .stock-row:hover {
  border-color: var(--gold);
  transform: scale(1.008);
}

.page-faq .stock-row__mean {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--navy);
}

.page-faq .stock-row__act {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

.page-faq .stock-row__act b {
  color: var(--red);
  font-weight: 700;
}

/* ============ 04 安装准备 ============ */
.page-faq .install-grid {
  display: grid;
  gap: 16px;
}

.page-faq .install-card {
  padding: 20px 18px;
  background: var(--paper);
  border: 1px solid var(--fog);
  border-top: 3px solid var(--red);
}

.page-faq .install-card:nth-child(2) {
  border-top-color: var(--gold);
}

.page-faq .install-card:nth-child(3) {
  border-top-color: var(--jade);
}

.page-faq .install-card h3 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--navy);
}

.page-faq .install-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .install-card li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .install-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 1px;
  background: var(--gold);
}

.page-faq .size-check {
  margin-top: 26px;
  padding: 22px 18px;
  background: var(--sand);
}

.page-faq .size-check h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--navy);
}

.page-faq .size-check__note {
  margin: 10px 0 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .size-check ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
}

.page-faq .size-check li {
  padding: 7px 12px;
  font-size: 13px;
  color: var(--navy);
  background: var(--paper);
  border: 1px solid var(--fog);
}

/* ============ 05 维修与返修 ============ */
.page-faq .fix-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .fix-list__item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 16px;
  padding: 18px 0;
  border-top: 1px solid var(--fog);
}

.page-faq .fix-list__item:last-child {
  border-bottom: 1px solid var(--fog);
}

.page-faq .fix-list__no {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 14px;
  color: var(--gold);
  padding-top: 3px;
}

.page-faq .fix-list h3 {
  margin: 0 0 7px;
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
}

.page-faq .fix-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

.page-faq .verify-panel {
  margin-top: 26px;
  padding: 24px 20px;
}

.page-faq .verify-panel h3 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--navy);
}

.page-faq .verify-panel ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .verify-panel li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--navy);
}

.page-faq .verify-panel li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 7px;
  width: 10px;
  height: 5px;
  border-left: 2px solid var(--jade);
  border-bottom: 2px solid var(--jade);
  transform: rotate(-45deg);
}

/* ============ 06 收尾提示 ============ */
.page-faq .faq-cta {
  padding: 32px 20px 30px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-faq .faq-cta .eyebrow {
  color: var(--gold);
}

.page-faq .faq-cta h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 5.4vw, 32px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-cta__lead {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(251, 248, 244, 0.78);
}

.page-faq .faq-cta__channels {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-faq .faq-channel {
  padding-top: 14px;
  border-top: 1px solid var(--gold-line);
}

.page-faq .faq-channel__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-faq .faq-channel__value {
  display: block;
  margin-top: 9px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 17px;
  line-height: 1.4;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-cta__note {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(251, 248, 244, 0.62);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ============ 断点 ============ */
@media (min-width: 680px) {
  .page-faq .faq-cta {
    padding: 44px 40px 40px;
  }

  .page-faq .stock-list {
    gap: 12px;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-hero {
    padding-top: 44px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(300px, 0.85fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-head {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 28px;
    margin-bottom: 34px;
  }

  .page-faq .install-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .faq-cta__channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }

  .page-faq .stock-row {
    grid-template-columns: 118px minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-split__aside {
    position: sticky;
    top: 92px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] .qa__a {
    animation: none;
  }

  .page-faq .faq-jump__item,
  .page-faq .tier,
  .page-faq .stock-row,
  .page-faq .qa {
    transition: none;
  }
}
<<<END>>>