.page-faq {
  --faq-rail-w: 218px;
  --faq-dash: rgba(220, 231, 225, 0.22);
  --faq-dash-strong: rgba(220, 231, 225, 0.34);
  --faq-font-answer: clamp(0.94rem, 1.35vw, 1.02rem);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  padding-top: clamp(12px, 2vw, 22px);
  padding-bottom: clamp(4px, 0.8vw, 10px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--grass);
  border-top: var(--frame) solid var(--faq-dash);
  border-bottom: var(--frame) solid var(--faq-dash-strong);
  padding: clamp(30px, 5.2vw, 66px) 0 clamp(28px, 4.4vw, 58px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 0 auto;
  width: 50%;
  background: var(--paper);
  clip-path: polygon(40% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(87, 211, 198, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(87, 211, 198, 0.07) 1px, transparent 1px);
  background-size: 78px 78px;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 64rem;
}

.page-faq .faq-hero__title {
  margin: 0.5em 0 0.55em;
  max-width: 15ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 7.6vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.015em;
  color: var(--line);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 38ch;
  font-size: clamp(0.98rem, 1.5vw, 1.1rem);
  line-height: 1.8;
  color: var(--moss);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(14px, 2.6vw, 34px);
  margin: clamp(22px, 3.4vw, 38px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__meta li {
  padding-left: 12px;
  border-left: 3px solid var(--amber);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: var(--moss);
}

.page-faq .faq-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.3rem, 2.6vw, 1.9rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--cyan);
  white-space: nowrap;
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  padding: clamp(26px, 4.4vw, 62px) 0 clamp(40px, 6vw, 92px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 44px);
}

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

/* ---------- 左侧目录 ---------- */
.page-faq .faq-rail {
  min-width: 0;
}

.page-faq .faq-rail__title {
  margin: 0 0 8px;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--moss);
}

.page-faq .faq-rail__nav {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--faq-dash);
  scrollbar-width: thin;
}

.page-faq .faq-rail__link {
  flex: 0 0 auto;
  padding: 6px 10px;
  border: var(--frame) solid var(--faq-dash);
  color: var(--moss);
  font-size: 0.82rem;
  line-height: 1.5;
  text-decoration: none;
  white-space: nowrap;
  transition: color 140ms ease, border-color 140ms ease, background-color 140ms ease;
}

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

.page-faq .faq-rail__link.is-active {
  color: var(--paper-ink);
  background: var(--amber);
  border-color: var(--amber);
}

/* ---------- 筛选工具条 ---------- */
.page-faq .faq-tools {
  margin-bottom: clamp(26px, 4vw, 48px);
  padding: clamp(14px, 2vw, 22px);
  background: var(--grass-mid);
  border: var(--frame) solid rgba(87, 211, 198, 0.3);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

.page-faq .faq-tools__label {
  margin: 0 0 10px;
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}

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

.page-faq .faq-search {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--faq-dash);
}

.page-faq .faq-search__label {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--moss);
}

.page-faq .faq-search__input {
  flex: 1 1 220px;
  min-width: 0;
  padding: 9px 12px;
  background: var(--ink);
  border: var(--frame) solid var(--faq-dash-strong);
  color: var(--line);
  font-family: var(--font-display);
  font-size: 0.92rem;
  line-height: 1.5;
}

.page-faq .faq-search__input::placeholder {
  color: var(--moss);
}

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

.page-faq .faq-status {
  margin: 10px 0 0;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-faq .faq-status:empty {
  display: none;
}

.page-faq [data-filter-item][hidden] {
  display: none;
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  padding-bottom: clamp(30px, 4.6vw, 58px);
  margin-bottom: clamp(30px, 4.6vw, 58px);
  border-bottom: 1px dashed var(--faq-dash);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-sec:last-child {
  border-bottom: 0;
  padding-bottom: 0;
  margin-bottom: 0;
}

.page-faq .faq-sec__head {
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-faq .faq-sec__kicker {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--red);
}

.page-faq .faq-sec__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.4vw, 2.5rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--line);
}

.page-faq .faq-sec__note {
  margin: 10px 0 0;
  max-width: 46ch;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--moss);
}

/* ---------- 速览列表 ---------- */
.page-faq .faq-brief {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--frame) solid var(--faq-dash-strong);
}

.page-faq .faq-brief__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: clamp(14px, 2vw, 20px) 0;
  border-bottom: 1px dashed var(--faq-dash);
}

.page-faq .faq-brief__q {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(0.98rem, 1.7vw, 1.15rem);
  line-height: 1.45;
  color: var(--line);
}

.page-faq .faq-brief__a {
  margin: 0;
  font-size: var(--faq-font-answer);
  line-height: 1.78;
  color: var(--moss);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 clamp(18px, 2.6vw, 30px);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  border-top: var(--frame) solid var(--faq-dash-strong);
}

.page-faq .faq-item {
  border-bottom: 1px dashed var(--faq-dash);
}

.page-faq .faq-item[open] {
  background: rgba(23, 57, 46, 0.42);
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: clamp(10px, 1.6vw, 18px);
  padding: clamp(14px, 2vw, 20px) clamp(10px, 1.4vw, 16px);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1rem, 1.85vw, 1.32rem);
  line-height: 1.42;
  color: var(--line);
}

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

.page-faq .faq-q::marker {
  content: "";
}

.page-faq .faq-q:hover {
  color: var(--amber);
}

.page-faq .faq-q__index {
  flex: 0 0 auto;
  padding-top: 0.44em;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(0.72rem, 1.1vw, 0.84rem);
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .faq-q__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-q__sign {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 0.44em;
  margin-left: auto;
  border: var(--frame) solid var(--amber);
}

.page-faq .faq-q__sign::before,
.page-faq .faq-q__sign::after {
  content: "";
  position: absolute;
  background: var(--amber);
}

.page-faq .faq-q__sign::before {
  top: 50%;
  left: 3px;
  right: 3px;
  height: 1.5px;
  transform: translateY(-50%);
}

.page-faq .faq-q__sign::after {
  left: 50%;
  top: 3px;
  bottom: 3px;
  width: 1.5px;
  transform: translateX(-50%);
  transition: transform 160ms ease, opacity 160ms ease;
}

.page-faq .faq-item[open] .faq-q__sign::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-a {
  margin: 0 clamp(10px, 1.4vw, 16px) clamp(14px, 2vw, 20px);
  padding: clamp(13px, 1.8vw, 18px) clamp(14px, 2.2vw, 22px);
  max-width: 48rem;
  background: var(--paper);
  color: var(--paper-ink);
  border-left: 4px solid var(--amber);
  font-size: var(--faq-font-answer);
  line-height: 1.78;
}

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

.page-faq .faq-a a {
  color: var(--paper-ink);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

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

/* ---------- 页尾联系 ---------- */
.page-faq .faq-help {
  border-bottom: 0;
  border-top: var(--frame) solid var(--faq-dash-strong);
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
}

.page-faq .faq-help__lead {
  margin: 12px 0 0;
  max-width: 44ch;
  font-size: clamp(0.96rem, 1.45vw, 1.05rem);
  line-height: 1.8;
  color: var(--moss);
}

.page-faq .faq-help__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-faq .faq-help__figure {
  margin: 0;
}

/* ---------- 响应式 ---------- */
@media (max-width: 899px) {
  .page-faq .faq-hero::before {
    display: none;
  }

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

  .page-faq .faq-hero__lead {
    max-width: 54ch;
  }

  .page-faq .faq-hero::after {
    background-size: 56px 56px;
  }
}

@media (min-width: 700px) {
  .page-faq .faq-brief {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(20px, 3vw, 40px);
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
  }
}

@media (min-width: 920px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    column-gap: clamp(28px, 4vw, 64px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 22px);
    border-left: 3px solid var(--amber);
    padding-left: 16px;
  }

  .page-faq .faq-rail__nav {
    flex-direction: column;
    flex-wrap: wrap;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .page-faq .faq-rail__link {
    border: 0;
    border-left: 2px solid transparent;
    padding: 7px 8px;
    white-space: normal;
    font-size: 0.86rem;
  }

  .page-faq .faq-rail__link.is-active {
    background: rgba(242, 179, 61, 0.14);
    border-left-color: var(--amber);
    color: var(--amber);
  }

  .page-faq .faq-hero__title {
    font-size: clamp(2.8rem, 6.4vw, 5.4rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-q__sign::after,
  .page-faq .faq-rail__link {
    transition: none;
  }
}
<<<END>>>