.page-faq {
  --faq-rail: 244px;
  --faq-soft: rgba(53, 231, 198, 0.1);
  background: var(--ink);
  color: var(--white);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 26px 0 44px;
  background:
    radial-gradient(112% 124% at 84% -8%, rgba(53, 231, 198, 0.14), transparent 56%),
    radial-gradient(92% 96% at -12% 108%, rgba(28, 107, 94, 0.34), transparent 62%),
    var(--ink);
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 26px;
}

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

.page-faq .faq-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 6.1vw, 56px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 14px 0 18px;
  color: var(--white);
}

.page-faq .faq-title em {
  font-style: normal;
  color: var(--cyan);
}

.page-faq .faq-lede {
  max-width: 35em;
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--moss);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-stat {
  padding: 16px 10px 14px;
  border-left: 1px solid var(--line);
  min-width: 0;
}

.page-faq .faq-stat:first-child {
  border-left: 0;
  padding-left: 0;
}

.page-faq .faq-stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 5.4vw, 36px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-faq .faq-stat__unit {
  font-size: 12px;
  color: var(--moss);
  margin-left: 3px;
  letter-spacing: 0.04em;
}

.page-faq .faq-stat__label {
  display: block;
  margin-top: 9px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--concrete);
}

/* ---------- 工具条 ---------- */
.page-faq .faq-body {
  padding: 34px 0 76px;
}

.page-faq .faq-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 34px;
}

.page-faq .faq-tools__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--concrete);
}

.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .filter-btn {
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--moss);
  background: transparent;
  border: 1px solid var(--line);
  padding: 7px 14px;
  cursor: pointer;
  clip-path: var(--cut-sm);
  transition: color 0.18s var(--ease), background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .filter-btn:hover {
  color: var(--white);
  border-color: var(--mid);
}

.page-faq .filter-btn[aria-pressed="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
  font-weight: 600;
}

.page-faq .filter-btn:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
}

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

/* ---------- 右侧细索引 ---------- */
.page-faq .faq-rail {
  order: -1;
  border-top: 1px solid var(--line);
  padding-top: 14px;
  min-width: 0;
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--concrete);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail__item {
  flex: 0 0 auto;
  min-width: 0;
}

.page-faq .faq-rail__link {
  display: block;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--moss);
  text-decoration: none;
  padding: 7px 10px;
  border-left: 2px solid transparent;
  white-space: nowrap;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-rail__link span {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--concrete);
  margin-bottom: 3px;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--white);
  border-left-color: var(--cyan);
}

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

.page-faq .faq-rail__foot {
  display: none;
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.72;
  color: var(--concrete);
}

/* ---------- 问答面板 ---------- */
.page-faq .qa-panel {
  position: relative;
  margin-bottom: 14px;
  scroll-margin-top: 96px;
  clip-path: var(--cut-sm);
  background:
    linear-gradient(180deg, rgba(53, 231, 198, 0.055), transparent 100px),
    var(--ink-2);
}

.page-faq .qa-panel.is-hidden {
  display: none;
}

.page-faq .qa-panel__summary {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 22px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa-panel__summary::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan) 0 56px, var(--line) 56px 100%);
}

.page-faq .qa-panel[open] .qa-panel__summary::before {
  background: linear-gradient(90deg, var(--signal) 0 56px, var(--cyan) 56px 100%);
}

.page-faq .qa-panel__summary:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: -2px;
}

.page-faq .qa-panel__mark {
  flex: 0 0 auto;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .qa-panel__q {
  flex: 1 1 auto;
  margin: 0;
  min-width: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(17px, 2.5vw, 21px);
  line-height: 1.44;
  letter-spacing: -0.005em;
  color: var(--white);
}

.page-faq .qa-panel__toggle {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 4px;
  border: 1px solid var(--line);
}

.page-faq .qa-panel__toggle::before,
.page-faq .qa-panel__toggle::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--cyan);
}

.page-faq .qa-panel__toggle::before {
  width: 9px;
  height: 1px;
}

.page-faq .qa-panel__toggle::after {
  width: 1px;
  height: 9px;
  transition: opacity 0.18s var(--ease);
}

.page-faq .qa-panel[open] .qa-panel__toggle::after {
  opacity: 0;
}

.page-faq .qa-panel[open] .qa-panel__toggle {
  border-color: var(--mid);
}

.page-faq .qa-panel__body {
  padding: 0 18px 24px;
}

/* ---------- 步骤 ---------- */
.page-faq .qa-lead {
  margin: 0 0 4px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--moss);
}

.page-faq .qa-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  margin-top: 16px;
}

.page-faq .qa-step {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .qa-step__num {
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--mid);
  padding-top: 2px;
}

.page-faq .qa-panel[open] .qa-step__num {
  color: var(--cyan);
}

.page-faq .qa-step__title {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--white);
}

.page-faq .qa-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--moss);
}

.page-faq .qa-note {
  margin: 18px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--signal);
  font-size: 13.5px;
  line-height: 1.74;
  color: var(--concrete);
}

.page-faq .qa-more {
  margin: 20px 0 0;
}

.page-faq .qa-more .btn {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.04em;
  padding: 10px 20px;
  text-decoration: none;
}

/* ---------- 适配清单 ---------- */
.page-faq .fit-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .fit-item {
  display: grid;
  grid-template-columns: 18px 26px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
}

.page-faq .fit-item__box {
  -webkit-appearance: none;
  appearance: none;
  position: relative;
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  flex: 0 0 auto;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .fit-item__box:checked {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .fit-item__box:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 9px;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  transform: rotate(42deg);
}

.page-faq .fit-item__box:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-faq .fit-item__idx {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--mid);
}

.page-faq .fit-item__text {
  min-width: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--moss);
  transition: opacity 0.18s var(--ease);
}

.page-faq .fit-item__text b {
  color: var(--white);
  font-weight: 600;
  margin-right: 5px;
}

.page-faq .fit-item__box:checked ~ .fit-item__text {
  opacity: 0.42;
}

/* ---------- 标签矩阵 ---------- */
.page-faq .tag-matrix {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-faq .tag-matrix li {
  display: grid;
  grid-template-columns: minmax(0, 88px) minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.page-faq .tag-matrix .tag {
  justify-self: start;
  font-size: 11px;
  letter-spacing: 0.14em;
  padding: 4px 9px;
  color: var(--cyan);
  border: 1px solid var(--mid);
  background: rgba(53, 231, 198, 0.08);
  white-space: nowrap;
}

.page-faq .tag-matrix p {
  margin: 0;
  min-width: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--moss);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 22px 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: var(--cut-tr);
  background: var(--panel);
}

.page-faq .faq-figure--tall img {
  max-width: 320px;
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--concrete);
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero {
    padding: 34px 0 52px;
  }

  .page-faq .qa-panel__summary {
    padding: 24px 24px;
    gap: 18px;
  }

  .page-faq .qa-panel__body {
    padding: 0 24px 28px 24px;
  }

  .page-faq .qa-step {
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 16px;
  }

  .page-faq .fit-item {
    grid-template-columns: 18px 34px minmax(0, 1fr);
    gap: 14px;
  }

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

  .page-faq .tag-matrix li {
    grid-template-columns: minmax(0, 84px) minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: 44px;
  }

  .page-faq .faq-stats {
    grid-template-columns: minmax(0, 1fr);
    border-bottom: 0;
  }

  .page-faq .faq-stat {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 14px;
    padding: 13px 0;
    border-left: 0;
    border-bottom: 1px solid var(--line);
  }

  .page-faq .faq-stat:last-child {
    border-bottom: 0;
  }

  .page-faq .faq-stat__value {
    order: 2;
    font-size: 30px;
  }

  .page-faq .faq-stat__label {
    margin-top: 0;
    order: 1;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) var(--faq-rail);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-rail {
    order: 0;
    position: sticky;
    top: 30px;
    border-top: 0;
    border-left: 1px solid var(--line);
    padding: 4px 0 0 20px;
  }

  .page-faq .faq-rail__list {
    display: block;
    overflow: visible;
  }

  .page-faq .faq-rail__item {
    flex: none;
  }

  .page-faq .faq-rail__link {
    white-space: normal;
    padding: 10px 0 10px 14px;
    border-left: 2px solid var(--line);
  }

  .page-faq .faq-rail__foot {
    display: block;
  }

  .page-faq .qa-panel__summary {
    padding: 26px 28px;
  }

  .page-faq .qa-panel__body {
    padding: 0 28px 30px 28px;
  }

  .page-faq .tag-matrix {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 36px;
  }
}
<<<END>>>