.page-faq {
  --faq-line: rgba(11, 27, 43, 0.16);
  --faq-aside-w: 200px;
}

/* ===== 首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  padding: clamp(18px, 3.5vw, 30px) 0 clamp(34px, 6.5vw, 68px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: auto;
  right: -12%;
  bottom: -45%;
  left: 42%;
  height: 80%;
  background: radial-gradient(closest-side, rgba(217, 84, 30, 0.34), transparent 72%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .breadcrumbs,
.page-faq .faq-hero .breadcrumbs a {
  color: rgba(247, 243, 234, 0.7);
}

.page-faq .faq-hero .breadcrumbs a:hover {
  color: var(--paper);
}

.page-faq .faq-hero .breadcrumbs [aria-current="page"] {
  color: var(--paper);
}

.page-faq .faq-hero .eyebrow {
  margin: 20px 0 10px;
  color: var(--brass);
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  max-width: 19ch;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(28px, 6.2vw, 56px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero .lede {
  max-width: 62ch;
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(247, 243, 234, 0.82);
}

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

.page-faq .faq-hero .btn--outline {
  color: var(--paper);
  border-color: rgba(247, 243, 234, 0.48);
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px 26px;
  margin: 34px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line-invert);
  list-style: none;
}

.page-faq .fact-k {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brass);
}

.page-faq .fact-v {
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--paper);
}

@media (min-width: 720px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ===== 主体栅格 ===== */
.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 52px);
  align-items: start;
  padding-top: clamp(34px, 6vw, 68px);
  padding-bottom: clamp(46px, 8vw, 92px);
}

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

@media (min-width: 1080px) {
  .page-faq .faq-body__grid {
    grid-template-columns: minmax(0, 1fr) var(--faq-aside-w);
    column-gap: 48px;
  }

  .page-faq .side-index {
    position: sticky;
    top: 26px;
    align-self: start;
  }
}

@media (max-width: 1079px) {
  .page-faq .side-index {
    display: none;
  }
}

.page-faq .side-index__title {
  margin: 0 0 12px;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--graphite);
}

.page-faq .side-index ul {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--faq-line);
}

.page-faq .side-index__link {
  display: block;
  padding: 7px 0 7px 14px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  font-size: 14px;
  line-height: 1.5;
  color: var(--graphite);
  text-decoration: none;
}

.page-faq .side-index__link:hover,
.page-faq .side-index__link:focus-visible {
  color: var(--ink);
  border-left-color: var(--terra);
}

/* ===== 章节 ===== */
.page-faq .faq-sec {
  scroll-margin-top: 92px;
  padding-top: clamp(26px, 4vw, 42px);
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-sec:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .section-head {
  margin-bottom: clamp(16px, 2.5vw, 24px);
}

.page-faq .section-head__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 18px;
}

.page-faq .section-head h2 {
  margin: 6px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(21px, 3.3vw, 30px);
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-faq .read-time {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--graphite);
  white-space: nowrap;
}

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

/* ===== 01 链接条 ===== */
.page-faq .req-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .req-links a {
  display: block;
  padding: 13px 16px;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  box-shadow: var(--sheet);
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.page-faq .req-links a::after {
  content: " →";
  color: var(--terra);
}

.page-faq .req-links a:hover {
  transform: translateY(-2px);
  box-shadow: var(--sheet-hover);
}

.page-faq .req-links a:focus-visible {
  outline: 2px solid var(--terra);
  outline-offset: 2px;
}

@media (min-width: 640px) {
  .page-faq .req-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ===== 02 安装前 ===== */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 32px);
}

@media (min-width: 900px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  }
}

.page-faq .req-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-faq .req-card {
  padding: 16px 18px 18px;
  border: 1px solid var(--faq-line);
  background: var(--paper);
  box-shadow: var(--sheet);
}

.page-faq .req-card__title {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 10px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-faq .req-card__title::before {
  content: "";
  flex: 0 0 auto;
  width: 14px;
  height: 2px;
  background: var(--terra);
}

.page-faq .req-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 7px;
}

.page-faq .req-list li {
  position: relative;
  padding-left: 22px;
  font-size: 14.8px;
  line-height: 1.65;
  color: var(--graphite);
}

.page-faq .req-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 12px;
  height: 12px;
  border: 1px solid var(--line-strong);
  background: transparent;
}

.page-faq .prep-block {
  margin-top: 22px;
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--terra);
  background: var(--paper-2);
}

.page-faq .prep-block__title {
  margin: 0 0 12px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .prep-list li::before {
  background: var(--paper);
}

.page-faq .faq-split__aside {
  display: grid;
  gap: 16px;
  align-content: start;
  min-width: 0;
}

.page-faq .prep-note {
  margin: 0;
  padding: 14px 16px;
  border-left: 3px solid var(--brass);
  background: var(--paper-2);
  font-size: 14.2px;
  line-height: 1.78;
  color: var(--graphite);
}

/* 图片 */
.page-faq .faq-fig {
  margin: 0;
}

.page-faq .faq-fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  background: var(--paper-2);
}

.page-faq .faq-fig figcaption {
  margin-top: 9px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--graphite);
}

.page-faq .faq-fig--wide {
  margin-top: clamp(22px, 3.5vw, 34px);
}

/* ===== 03 时间轴 ===== */
.page-faq .tl {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .tl__item {
  position: relative;
  padding: 0 0 clamp(20px, 3.4vw, 30px) clamp(24px, 4vw, 36px);
  border-left: 1px solid var(--line-strong);
}

.page-faq .tl__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-faq .tl__node {
  position: absolute;
  left: -7px;
  top: 4px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--brass);
  box-shadow: 0 0 0 3px var(--paper);
  transition: background 0.18s ease;
}

.page-faq .tl__item:hover .tl__node {
  background: var(--terra);
}

.page-faq .tl__time {
  margin: 0 0 4px;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brass-ink);
  transition: color 0.18s ease;
}

.page-faq .tl__item:hover .tl__time {
  color: var(--terra-deep);
}

.page-faq .tl__title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-faq .tl__body {
  max-width: 62ch;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--graphite);
}

/* ===== 04 日历尺 ===== */
.page-faq .cal-ruler {
  margin: clamp(22px, 3.5vw, 34px) 0 0;
}

.page-faq .cal-ruler__cap {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--graphite);
}

.page-faq .cal-ruler__track {
  display: flex;
  border-top: 2px solid var(--ink);
}

.page-faq .cal-ruler__tick {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  padding-top: 13px;
  text-align: center;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--graphite);
}

.page-faq .cal-ruler__tick::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 50%;
  width: 1px;
  height: 9px;
  background: var(--line-strong);
  transform: translateX(-50%);
}

.page-faq .cal-ruler__tick--start,
.page-faq .cal-ruler__tick--end {
  font-weight: 700;
  color: var(--terra-deep);
}

.page-faq .cal-ruler__tick--start::before,
.page-faq .cal-ruler__tick--end::before {
  width: 2px;
  height: 15px;
  background: var(--terra);
}

/* ===== 05 报修与保养 ===== */
.page-faq .after-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-faq .after-card {
  padding: 18px 18px 20px;
  border: 1px solid var(--faq-line);
  background: var(--paper);
  box-shadow: var(--sheet);
  align-self: start;
}

.page-faq .after-card__k {
  margin: 0 0 6px;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brass-ink);
}

.page-faq .after-card__v {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 4vw, 32px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-faq .after-card__d {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--graphite);
}

@media (min-width: 720px) {
  .page-faq .after-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .after-card:nth-child(2) {
    margin-top: 16px;
  }

  .page-faq .after-card:nth-child(3) {
    margin-top: 32px;
  }
}

.page-faq .after-cta {
  margin: clamp(26px, 4vw, 40px) 0 0;
}

/* ===== 06 问答 ===== */
.page-faq .accordion {
  border-top: 1px solid var(--faq-line);
}

.page-faq .accordion__item {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .accordion__item h3 {
  margin: 0;
}

.page-faq .accordion__btn {
  display: flex;
  width: 100%;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 4px;
  border: 0;
  background: transparent;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
  text-align: left;
  color: var(--ink);
  cursor: pointer;
  transition: color 0.18s ease;
}

.page-faq .accordion__btn:hover {
  color: var(--terra-deep);
}

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

.page-faq .accordion__sign {
  flex: 0 0 auto;
  margin-top: 1px;
  font-family: var(--font-num);
  font-size: 18px;
  line-height: 1;
  color: var(--terra);
}

.page-faq .accordion__panel {
  padding: 0 4px 20px;
}

.page-faq .accordion__panel p {
  max-width: 68ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--graphite);
}

.page-faq .accordion__panel a {
  color: var(--terra-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .accordion__panel a:focus-visible {
  outline: 2px solid var(--terra);
  outline-offset: 2px;
}

/* ===== 打印 ===== */
@media print {
  .page-faq .side-index,
  .page-faq .faq-hero__actions {
    display: none;
  }

  .page-faq .accordion__panel[hidden] {
    display: block !important;
  }

  .page-faq .faq-sec {
    border-top: 1px solid #999;
    break-inside: avoid;
  }
}

/* ===== 动效克制 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-faq .req-links a,
  .page-faq .tl__node,
  .page-faq .tl__time,
  .page-faq .accordion__btn {
    transition: none;
  }

  .page-faq .req-links a:hover {
    transform: none;
  }
}
<<<END>>>