/* ===== 知识库页面 ===== */
.page-faq {
  --faq-rail-w: 250px;
  --faq-soft: rgba(247, 247, 245, 0.06);
  padding: 1.5rem 0 5.5rem;
  color: var(--text-body);
  overflow-x: hidden;
}

.page-faq .faq-hero {
  display: grid;
  gap: 2rem;
  padding-bottom: 2.25rem;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--edge);
}

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

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.95rem, 4.4vw, 3.2rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--snow);
  margin: 0.75rem 0 1rem;
  max-width: 20ch;
}

.page-faq .faq-hero__lead {
  font-size: clamp(1rem, 1.4vw, 1.08rem);
  line-height: 1.85;
  color: var(--text-body);
  max-width: 52ch;
  margin: 0;
}

/* 搜索 */
.page-faq .faq-search {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-top: 1.6rem;
  padding: 0.45rem 0.9rem 0.45rem 1.05rem;
  background: var(--ink-1);
  border: 1px solid var(--edge-strong);
  border-radius: var(--pill);
  max-width: 34rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-faq .faq-search:focus-within {
  border-color: var(--coral);
  box-shadow: 0 0 0 3px rgba(255, 107, 74, 0.16);
}

.page-faq .faq-search__icon {
  flex: none;
  color: var(--coral);
}

.page-faq .faq-search input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--snow);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 0.55rem 0;
  outline: none;
}

.page-faq .faq-search input::placeholder {
  color: var(--gray);
}

.page-faq .faq-search__hint {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--gray);
  padding: 0.22rem 0.6rem;
  border-radius: var(--pill);
  background: var(--faq-soft);
}

/* 首屏指标 */
.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.65rem;
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
}

.page-faq .faq-hero__stats li {
  display: inline-flex;
  align-items: baseline;
  gap: 0.42rem;
  padding: 0.38rem 0.85rem;
  border-radius: var(--pill);
  background: var(--faq-soft);
  border: 1px solid var(--edge);
  font-size: 0.8rem;
  color: var(--gray);
}

.page-faq .faq-hero__stats b {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--snow);
}

.page-faq .faq-hero__stats li:first-child b {
  color: var(--coral);
}

/* 首屏视觉 */
.page-faq .faq-hero__visual {
  position: relative;
  min-width: 0;
}

.page-faq .faq-hero__media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-faq .faq-hero__chip {
  position: absolute;
  left: 0.85rem;
  bottom: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.12rem;
  padding: 0.6rem 0.95rem;
  border-radius: var(--r-md);
  background: var(--coral);
  box-shadow: var(--shadow);
}

.page-faq .faq-hero__chip-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--ink-deep);
  letter-spacing: 0.02em;
}

.page-faq .faq-hero__chip-txt {
  font-size: 0.72rem;
  color: rgba(10, 17, 48, 0.78);
}

/* 筛选条 */
.page-faq .faq-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1.9rem;
}

.page-faq .faq-filters .filter-btn {
  padding: 0.42rem 0.95rem;
  border-radius: var(--pill);
  border: 1px solid var(--edge);
  background: transparent;
  color: var(--text-body);
  font-family: var(--font-body);
  font-size: 0.86rem;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-filters .filter-btn:hover {
  border-color: var(--coral-soft);
  color: var(--snow);
}

.page-faq .faq-filters .filter-btn[aria-pressed="true"] {
  background: var(--coral);
  border-color: var(--coral);
  color: var(--ink-deep);
  font-weight: 700;
}

/* 主体布局 */
.page-faq .faq-layout {
  display: grid;
  gap: 2rem;
  margin-top: 1.75rem;
}

/* 分类 rail */
.page-faq .faq-rail {
  border-radius: var(--r-lg);
  border: 1px solid var(--edge);
  background: linear-gradient(180deg, var(--ink-1) 0%, rgba(16, 26, 58, 0.62) 100%);
  padding: 1.1rem 0.95rem 1.2rem;
  min-width: 0;
}

.page-faq .faq-rail__label {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray);
}

.page-faq .faq-rail__nav {
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.7rem;
  border-radius: var(--r-sm);
  border-left: 3px solid transparent;
  color: var(--text-body);
  font-size: 0.92rem;
  text-decoration: none;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  background: rgba(255, 107, 74, 0.12);
  border-left-color: var(--coral);
  color: var(--snow);
}

.page-faq .faq-rail__idx {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--coral);
  letter-spacing: 0.06em;
}

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

.page-faq .faq-rail__count {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--gray);
}

.page-faq .faq-rail__note {
  margin: 1.1rem 0 0;
  padding-top: 0.9rem;
  border-top: 1px solid var(--edge);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--gray);
}

/* 分类区块 */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-cat {
  margin-bottom: 2.4rem;
  scroll-margin-top: 1.5rem;
}

.page-faq .faq-cat:last-child {
  margin-bottom: 0;
}

.page-faq .faq-cat__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.55rem 0.7rem;
  padding-bottom: 0.8rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--edge);
}

.page-faq .faq-cat__idx {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink-deep);
  background: var(--coral);
  padding: 0.16rem 0.5rem;
  border-radius: var(--r-sm);
}

.page-faq .faq-cat__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.2rem, 2.1vw, 1.55rem);
  color: var(--snow);
  letter-spacing: -0.005em;
}

.page-faq .faq-cat__tag {
  margin-left: auto;
}

.page-faq .faq-list {
  display: grid;
  gap: 0.6rem;
}

/* 条目 */
.page-faq .faq-item {
  border: 1px solid var(--edge);
  border-radius: var(--r-md);
  background: var(--ink-1);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-item:hover {
  border-color: var(--edge-strong);
}

.page-faq .faq-item[open] {
  border-color: rgba(255, 107, 74, 0.48);
}

.page-faq .faq-item__no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--coral);
  margin: 0;
  flex: none;
}

.page-faq .faq-item__q {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--snow);
  margin: 0;
}

.page-faq .faq-item__a {
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--text-body);
  margin: 0;
}

.page-faq .faq-item__a a {
  color: var(--coral-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 折叠条目 */
.page-faq details.faq-item {
  overflow: hidden;
}

.page-faq details.faq-item > summary {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 1rem 1.1rem;
  cursor: pointer;
  list-style: none;
  transition: background 0.18s ease;
}

.page-faq details.faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq details.faq-item > summary::after {
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--coral);
}

.page-faq details.faq-item[open] > summary::after {
  content: "−";
}

.page-faq details.faq-item > summary:hover {
  background: rgba(255, 107, 74, 0.08);
}

.page-faq details.faq-item > .folding-body {
  padding: 0 1.1rem 1.1rem;
}

/* 常显条目 */
.page-faq .faq-item--plain {
  padding: 0.95rem 1.1rem 1.05rem;
}

.page-faq .faq-item--plain .faq-item__q {
  margin: 0.35rem 0 0.4rem;
}

/* 显隐控制 */
.page-faq [data-filter-item][hidden] {
  display: none !important;
}

/* 反馈流程 */
.page-faq .faq-flow {
  margin-top: 3rem;
  padding: clamp(1.4rem, 3vw, 2.4rem);
  border-radius: var(--r-lg);
  border: 1px solid var(--edge);
  background:
    radial-gradient(circle at 88% 8%, rgba(255, 107, 74, 0.17), transparent 44%),
    radial-gradient(circle at 6% 96%, rgba(79, 174, 126, 0.14), transparent 40%),
    var(--ink-1);
}

.page-faq .faq-flow__grid {
  display: grid;
  gap: 1.75rem;
  align-items: start;
}

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

.page-faq .faq-flow h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  line-height: 1.3;
  color: var(--snow);
  margin: 0.6rem 0 0.8rem;
  max-width: 22ch;
}

.page-faq .faq-flow__lead {
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--text-body);
  max-width: 52ch;
  margin: 0;
}

.page-faq .faq-steps {
  list-style: none;
  counter-reset: faqstep;
  display: grid;
  gap: 0.9rem;
  margin: 1.6rem 0 0;
  padding: 0;
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: 0.85rem;
  align-items: start;
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  text-align: center;
  padding: 0.32rem 0;
  border-radius: var(--r-sm);
  background: var(--coral);
  color: var(--ink-deep);
}

.page-faq .faq-steps li:nth-child(2)::before {
  background: var(--butter);
}

.page-faq .faq-steps li:nth-child(3)::before {
  background: var(--barley);
  color: var(--snow);
}

.page-faq .faq-steps li:nth-child(4)::before {
  background: var(--coral-soft);
}

.page-faq .faq-steps li:nth-child(5)::before {
  background: var(--butter);
}

.page-faq .faq-steps b {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--snow);
  margin-bottom: 0.18rem;
}

.page-faq .faq-steps p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--gray);
}

.page-faq .faq-flow__media {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
}

/* 联系引导 */
.page-faq .faq-help {
  margin-top: 3rem;
  border-radius: var(--r-lg);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: 1.75rem;
}

.page-faq .faq-help__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--coral);
}

.page-faq .faq-help h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.3rem, 2.3vw, 1.75rem);
  line-height: 1.3;
  color: var(--char);
  margin: 0.55rem 0 0.75rem;
}

.page-faq .faq-help p {
  font-size: 0.95rem;
  line-height: 1.85;
  color: rgba(20, 22, 28, 0.76);
  max-width: 52ch;
  margin: 0 0 1.3rem;
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.1rem;
  align-self: start;
  border-top: 1px solid rgba(20, 22, 28, 0.12);
}

.page-faq .faq-help__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.3rem 0.9rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid rgba(20, 22, 28, 0.12);
}

.page-faq .faq-help__k {
  flex: none;
  min-width: 5.4rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: rgba(20, 22, 28, 0.5);
}

.page-faq .faq-help__v {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--char);
  word-break: break-all;
}

/* 响应式 */
@media (min-width: 700px) {
  .page-faq .faq-hero__stats {
    gap: 0.6rem 0.75rem;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-flow__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 2.5rem;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 2.5rem;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 2.75rem;
    align-items: center;
  }

  .page-faq .faq-hero__chip {
    left: -1.15rem;
    bottom: 1.35rem;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 3rem;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 1.5rem;
  }
}

@media (max-width: 999px) {
  .page-faq .faq-rail {
    padding: 0.9rem 0.85rem 1rem;
    border-radius: var(--r-md);
  }

  .page-faq .faq-rail__nav {
    flex-direction: row;
    gap: 0.4rem;
    overflow-x: auto;
    padding-bottom: 0.35rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }

  .page-faq .faq-rail__link {
    flex: none;
    border-left: 0;
    border-bottom: 2px solid transparent;
    background: var(--faq-soft);
    padding: 0.45rem 0.8rem;
    font-size: 0.86rem;
    white-space: nowrap;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-left-color: transparent;
    border-bottom-color: var(--coral);
  }

  .page-faq .faq-rail__count {
    display: none;
  }

  .page-faq .faq-rail__note {
    display: none;
  }

  .page-faq .faq-cat__tag {
    margin-left: 0;
  }
}

@media (max-width: 560px) {
  .page-faq .faq-search__hint {
    display: none;
  }

  .page-faq details.faq-item > summary {
    padding: 0.9rem 0.95rem;
  }

  .page-faq details.faq-item > .folding-body {
    padding: 0 0.95rem 1rem;
  }

  .page-faq .faq-item--plain {
    padding: 0.9rem 0.95rem 1rem;
  }

  .page-faq .faq-steps li {
    grid-template-columns: 2.2rem minmax(0, 1fr);
    gap: 0.7rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-rail__link,
  .page-faq .faq-search,
  .page-faq .faq-filters .filter-btn {
    transition: none;
  }
}
<<<END>>>