.page-faq {
  --faq-block-gap: clamp(34px, 6vw, 64px);
}

.page-faq .faq-crumb {
  padding-top: clamp(16px, 3vw, 26px);
}

/* 首屏：封面式布局 + 蓝图网格 */
.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(30px, 6vw, 68px) clamp(28px, 5vw, 56px);
  border-bottom: 1px solid var(--line-soft);
  background-image:
    linear-gradient(to right, rgba(42, 58, 90, 0.30) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 58, 90, 0.30) 1px, transparent 1px);
  background-size: 64px 64px;
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -60px;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle at 30% 30%, rgba(178, 58, 46, 0.34), rgba(178, 58, 46, 0) 68%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 5vw, 46px);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 6.2vw, 50px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--bone);
  margin: 14px 0 20px;
  max-width: 18ch;
}

.page-faq .faq-hero__lead p {
  font-family: var(--font-body);
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.9;
  color: var(--bone-soft);
  max-width: 62ch;
  margin: 0 0 14px;
}

.page-faq .faq-hero__lead p:last-child {
  color: var(--bone-dim);
  margin-bottom: 0;
}

/* 索引卡 */
.page-faq .faq-index {
  border: 1px solid var(--line-soft);
  border-radius: 6px 22px 22px 6px;
  background: linear-gradient(180deg, rgba(14, 22, 38, 0.92), rgba(7, 12, 22, 0.68));
  padding: 18px clamp(14px, 2.4vw, 24px) 10px;
}

.page-faq .faq-index__title {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--slate);
  margin: 0 0 10px;
}

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

.page-faq .faq-index li + li {
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-index a {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 3px 10px;
  padding: 12px 0;
  text-decoration: none;
}

.page-faq .faq-index__num {
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--sand);
  padding-top: 3px;
}

.page-faq .faq-index__label {
  font-family: var(--font-heading);
  font-size: 16px;
  color: var(--bone);
  transition: color 0.2s ease;
}

.page-faq .faq-index__note {
  grid-column: 2;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
}

.page-faq .faq-index a:hover .faq-index__label,
.page-faq .faq-index a:focus-visible .faq-index__label {
  color: var(--lime);
}

/* 教程区块 */
.page-faq .faq-block {
  padding-block: var(--faq-block-gap);
  border-bottom: 1px solid var(--line-soft);
  scroll-margin-top: 96px;
}

.page-faq .faq-block__idx {
  font-family: var(--font-data);
  font-size: clamp(18px, 3vw, 26px);
  letter-spacing: 0.16em;
  color: rgba(178, 58, 46, 0.92);
  margin: 0 0 8px;
}

.page-faq .faq-block__title {
  font-family: var(--font-display);
  font-size: clamp(22px, 3.6vw, 32px);
  line-height: 1.32;
  color: var(--bone);
  margin: 0 0 14px;
  max-width: 24ch;
}

.page-faq .faq-block__lead {
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--bone-soft);
  max-width: 66ch;
  margin: 0 0 22px;
}

.page-faq .faq-block__lead a {
  color: var(--sand);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa__body .faq-block__lead {
  margin: 4px 0 0;
  font-size: 14.5px;
  color: var(--bone-dim);
}

/* 可展开内容组 */
.page-faq .qa {
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--grid-line);
  border-radius: 4px 16px 16px 4px;
  background: rgba(14, 22, 38, 0.6);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-faq .qa + .qa {
  margin-top: 12px;
}

.page-faq .qa[open] {
  border-left-color: var(--lime);
  background: rgba(14, 22, 38, 0.9);
}

.page-faq .qa__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-heading);
  font-size: 16px;
  color: var(--bone);
  transition: color 0.2s ease;
}

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

.page-faq .qa__summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-data);
  font-size: 15px;
  color: var(--sand);
}

.page-faq .qa[open] .qa__summary::after {
  content: "－";
  color: var(--lime);
}

.page-faq .qa__summary:hover {
  color: var(--lime);
}

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

.page-faq .qa__tick {
  flex: none;
  width: 9px;
  height: 9px;
  transform: rotate(45deg);
  background: var(--grid-line);
  transition: background 0.25s ease;
}

.page-faq .qa[open] .qa__tick {
  background: var(--lime);
}

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

.page-faq .qa__meta {
  flex: none;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--slate);
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  padding: 2px 8px;
}

.page-faq .qa__body {
  display: grid;
  gap: 20px;
  padding: 4px 18px 22px;
}

/* 步骤列表 */
.page-faq .steps {
  counter-reset: step;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .steps > li {
  counter-increment: step;
  position: relative;
  padding-left: 52px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--bone-soft);
}

.page-faq .steps > li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--lime);
  border: 1px solid rgba(183, 243, 76, 0.34);
  border-radius: 4px;
  background: rgba(183, 243, 76, 0.06);
  padding: 1px 5px;
}

.page-faq .steps strong {
  color: var(--sand);
  font-weight: 600;
}

/* 图示 */
.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-soft);
  border-radius: 10px;
  background: var(--panel);
}

.page-faq .faq-fig figcaption {
  margin-top: 10px;
  padding-left: 10px;
  border-left: 2px solid var(--ochre);
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

.page-faq .faq-fig--phone {
  max-width: 290px;
}

/* 三维筛选说明 */
.page-faq .dims {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .dims li {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-bottom: 9px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-faq .dims__key {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--sand);
}

.page-faq .dims__val {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--bone-soft);
}

/* 数据条 */
.page-faq .data-strip {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .stat {
  border-top: 2px solid var(--ochre);
  padding-top: 10px;
}

.page-faq .stat .data-num {
  display: block;
  font-size: clamp(20px, 3vw, 26px);
  margin-bottom: 6px;
}

.page-faq .stat__label {
  display: block;
  font-size: 13px;
  line-height: 1.65;
  color: var(--slate);
}

/* 收尾 */
.page-faq .faq-help {
  padding-block: clamp(40px, 6vw, 76px);
}

.page-faq .faq-help__inner {
  max-width: 68ch;
}

.page-faq .faq-help h2 {
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.34;
  color: var(--bone);
  margin: 0 0 14px;
}

.page-faq .faq-help p {
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--bone-soft);
  margin: 0 0 22px;
}

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

/* 桌面布局 */
@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: start;
  }

  .page-faq .faq-index {
    margin-top: 34px;
  }

  .page-faq .qa__body--split {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
    gap: 30px;
  }

  .page-faq .faq-fig--phone {
    max-width: 300px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero h1 {
    font-size: 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__summary,
  .page-faq .qa__tick,
  .page-faq .faq-index__label {
    transition: none;
  }
}
<<<END>>>