.page-faq {
  --faq-cut: 12px;
  --faq-hair: rgba(201, 214, 225, 0.16);
}

/* ---------- 面包屑留白 ---------- */
.page-faq .breadcrumb {
  padding-top: clamp(16px, 3vw, 28px);
  padding-bottom: clamp(10px, 2vw, 18px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--archive-navy);
  color: var(--on-navy);
  border-bottom: 3px solid var(--copper);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(201, 214, 225, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 214, 225, 0.07) 1px, transparent 1px);
  background-size: 72px 72px;
}

.page-faq .faq-hero__inner {
  position: relative;
  padding: clamp(28px, 5vw, 58px) 0 clamp(26px, 4.4vw, 50px);
}

.page-faq .faq-hero .eyebrow {
  color: var(--copper-light);
}

.page-faq .faq-hero__title {
  max-width: 22ch;
  margin: 12px 0 0;
  font-size: clamp(30px, 5.2vw, 52px);
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: #FDFBF7;
}

.page-faq .faq-hero__lead {
  max-width: 64ch;
  margin: clamp(14px, 2.4vw, 22px) 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--on-navy);
}

.page-faq .faq-hero__note {
  margin: clamp(18px, 3vw, 26px) 0 0;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: rgba(201, 214, 225, 0.68);
}

.page-faq .faq-hero__mark {
  position: absolute;
  top: clamp(24px, 6vw, 76px);
  right: clamp(8px, 2.4vw, 26px);
  z-index: 1;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: rgba(201, 214, 225, 0.5);
}

/* 三档卡片 */
.page-faq .faq-tracks {
  list-style: none;
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  grid-template-columns: 1fr;
  background: var(--faq-hair);
  border: 1px solid var(--faq-hair);
}

.page-faq .faq-track {
  background: #12293B;
  padding: 16px 18px 18px;
  border-top: 3px solid var(--blue-light);
}

.page-faq .faq-track--copper { border-top-color: var(--copper); }
.page-faq .faq-track--cyan { border-top-color: var(--cyan); }

.page-faq .faq-track__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: #FDFBF7;
}

.page-faq .faq-track__unit {
  margin-left: 8px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--copper-light);
}

.page-faq .faq-track__label {
  display: block;
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--on-navy);
}

/* ---------- 双栏：索引 + 答复 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
  padding: clamp(32px, 5vw, 64px) 0 clamp(48px, 7vw, 88px);
}

.page-faq .faq-index {
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--blue);
  padding: 16px 18px 18px;
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--graphite);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 8px 8px 6px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: background-color 120ms linear, border-color 120ms linear, color 120ms linear;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  border-left-color: var(--copper);
  background: var(--paper);
  color: var(--blue);
}

.page-faq .faq-index__list .mono {
  flex: none;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--copper);
}

.page-faq .faq-index__more {
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-index__more .btn {
  width: 100%;
  text-align: center;
}

/* ---------- 答复正文 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(34px, 5vw, 60px);
  min-width: 0;
}

.page-faq .faq-item {
  scroll-margin-top: 24px;
  min-width: 0;
}

.page-faq .faq-item__num {
  display: inline-block;
  margin: 0 0 12px;
  padding: 2px 8px;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--copper);
  border: 1px solid var(--copper);
}

.page-faq .faq-item h2 {
  margin: 0 0 16px;
  padding-bottom: 12px;
  font-size: clamp(22px, 3.2vw, 32px);
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--ink);
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-item > p {
  max-width: 68ch;
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .faq-note {
  max-width: 68ch;
  margin: 16px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--copper-light);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--graphite);
}

.page-faq .spec-table__wrap {
  margin: 20px 0 0;
  overflow-x: auto;
}

/* 材料清单 */
.page-faq .faq-checklist {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  max-width: 720px;
  border: 1px solid var(--line);
  background: var(--paper-white);
}

.page-faq .faq-checklist li {
  position: relative;
  padding: 14px 18px 14px 46px;
  border-top: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
}

.page-faq .faq-checklist li:first-child { border-top: 0; }

.page-faq .faq-checklist li::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 19px;
  width: 13px;
  height: 13px;
  border: 2px solid var(--copper);
}

.page-faq .faq-checklist strong {
  color: var(--blue);
  font-weight: 700;
}

.page-faq .faq-checklist--num li::before {
  border-color: var(--cyan);
}

/* 报修四段时限 */
.page-faq .faq-steps {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  grid-template-columns: 1fr;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-steps li {
  display: grid;
  gap: 4px;
  padding: 16px 18px 18px;
  background: var(--paper-white);
  border-top: 3px solid var(--blue);
}

.page-faq .faq-steps__num {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--copper);
}

.page-faq .faq-steps__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .faq-steps__time {
  margin-top: 4px;
  font-size: clamp(19px, 2.4vw, 24px);
  letter-spacing: 0.02em;
  color: var(--blue);
}

/* 图 */
.page-faq .faq-figure {
  margin: clamp(22px, 3vw, 32px) 0 0;
}

.page-faq .faq-figure__frame {
  padding: 8px;
  background: var(--paper-white);
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
}

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

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: var(--graphite);
}

/* 提示块内的链接 */
.page-faq .callout {
  margin-top: 22px;
  max-width: 720px;
}

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

.page-faq .callout a {
  color: var(--blue);
  text-underline-offset: 3px;
}

.page-faq .callout a:hover { color: var(--copper); }

/* 折叠问答 */
.page-faq .faq-fold {
  margin-top: 8px;
  background: var(--paper-white);
  border: 1px solid var(--line);
  transition: border-color 120ms linear;
}

.page-faq .faq-fold:first-of-type { margin-top: 20px; }

.page-faq .faq-fold[open] { border-color: var(--copper); }

.page-faq .faq-fold summary {
  position: relative;
  padding: 15px 46px 15px 18px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

.page-faq .faq-fold summary::-webkit-details-marker { display: none; }
.page-faq .faq-fold summary::marker { content: ""; }

.page-faq .faq-fold summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--copper);
}

.page-faq .faq-fold[open] summary::after { content: "\2212"; }

.page-faq .faq-fold summary:hover { color: var(--blue); }

.page-faq .faq-fold summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .faq-fold__num {
  margin-right: 8px;
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--copper);
}

.page-faq .faq-fold__a {
  padding: 0 18px 16px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-fold__a p {
  max-width: 66ch;
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .faq-fold__a a {
  color: var(--blue);
  text-underline-offset: 3px;
}

.page-faq .faq-fold__a a:hover { color: var(--copper); }

/* ---------- 收尾联系区 ---------- */
.page-faq .faq-close__inner {
  display: grid;
  gap: clamp(22px, 3.4vw, 36px);
}

.page-faq .faq-close .eyebrow { color: var(--copper-light); }

.page-faq .faq-close__title {
  margin: 10px 0 0;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.28;
  letter-spacing: 0.02em;
  color: #FDFBF7;
}

.page-faq .faq-close__text {
  max-width: 62ch;
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--on-navy);
}

.page-faq .faq-close .btn--ghost {
  color: #FDFBF7;
  border-color: rgba(201, 214, 225, 0.5);
}

.page-faq .faq-close .btn--ghost:hover {
  border-color: var(--copper-light);
  color: var(--copper-light);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-tracks {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-faq .faq-steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 860px) {
  .page-faq .faq-close__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(36px, 4.6vw, 64px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 24px;
  }

  .page-faq .faq-steps {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 719px) {
  .page-faq .faq-hero__mark { display: none; }

  .page-faq .faq-hero__title { max-width: none; }

  .page-faq .faq-track__num { font-size: 30px; }

  .page-faq .faq-checklist li { padding-left: 42px; }

  .page-faq .faq-checklist li::before { left: 16px; }

  .page-faq .faq-index__list a { padding-right: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__list a,
  .page-faq .faq-fold {
    transition: none;
  }
}
<<<END>>>