/* ============================================================
   知识中心 / page-faq
   ============================================================ */

.page-faq {
  --faq-sticky-top: 6.5rem;
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-faq .crumbs {
  padding-top: 2rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .04em;
}

.page-faq .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--text-mute);
}

.page-faq .crumbs li + li::before {
  content: "/";
  margin-right: .45rem;
  color: var(--stone);
}

.page-faq .crumbs a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .crumbs a:hover {
  color: var(--sonar);
  border-bottom-color: var(--sonar);
}

.page-faq .crumbs [aria-current] {
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-bottom: 0;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 1.4rem;
  padding-block: 2.5rem 2.25rem;
}

.page-faq .faq-hero__grid .eyebrow {
  margin: 0;
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 16ch;
}

.page-faq .faq-hero__accent {
  display: block;
  color: var(--sonar);
}

.page-faq .faq-hero .lede {
  margin: 0;
  max-width: 56ch;
  color: var(--text);
}

.page-faq .faq-wave {
  margin: 0;
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--ink-850);
}

.page-faq .faq-wave::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, var(--sonar-08), transparent 42%),
    linear-gradient(0deg, var(--ink-900), transparent 58%);
  pointer-events: none;
}

.page-faq .faq-wave img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

/* ---------- 问答主区 ---------- */
.page-faq .faq-board {
  padding-block: 3.25rem 3rem;
}

.page-faq .faq-board__head {
  margin-bottom: 1.9rem;
  max-width: 60ch;
}

.page-faq .faq-board__head h2 {
  margin: .55rem 0 .5rem;
}

.page-faq .faq-board__sub {
  margin: 0;
  color: var(--text-dim);
  font-size: .9375rem;
  line-height: 1.7;
}

.page-faq .faq-cols {
  display: grid;
  gap: 1.6rem;
}

/* ---------- 类目标签 ---------- */
.page-faq .faq-seg {
  display: flex;
  gap: .4rem;
  overflow-x: auto;
  padding-bottom: .65rem;
  align-self: start;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

.page-faq .faq-seg::-webkit-scrollbar {
  height: 3px;
}

.page-faq .faq-seg::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 3px;
}

.page-faq .faq-seg .seg-btn {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: .55rem;
  padding: .6rem .9rem;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text-dim);
  font-family: inherit;
  font-size: .875rem;
  line-height: 1.4;
  white-space: nowrap;
  cursor: pointer;
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-faq .faq-seg .seg-btn .cmd-index {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .04em;
  color: var(--stone);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-seg .seg-btn:hover {
  color: var(--text-strong);
  border-color: var(--line-sonar);
}

.page-faq .faq-seg .seg-btn[aria-selected="true"] {
  color: var(--ink-900);
  background: var(--sonar);
  border-color: var(--sonar);
}

.page-faq .faq-seg .seg-btn[aria-selected="true"] .cmd-index {
  color: rgba(6, 11, 22, .55);
}

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

/* ---------- 问答面板 ---------- */
.page-faq .faq-panels {
  min-width: 0;
}

.page-faq .seg-panel[hidden] {
  display: none;
}

.page-faq .faq-panel__title {
  margin: 0 0 .4rem;
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--text-strong);
}

.page-faq .faq-panel__note {
  margin: 0 0 1.2rem;
  max-width: 60ch;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--text-dim);
}

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

.page-faq .qa:first-of-type {
  border-top: 1px solid var(--line);
}

.page-faq .qa summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 1.05rem 2.6rem 1.05rem .1rem;
  font-size: 1.0625rem;
  font-weight: 500;
  line-height: 1.55;
  color: var(--text-strong);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .qa summary::after {
  content: "+";
  position: absolute;
  right: .4rem;
  top: 1.02rem;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  line-height: 1.45;
  color: var(--sonar);
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .qa[open] summary::after {
  transform: rotate(45deg);
  color: var(--coral);
}

.page-faq .qa summary:hover {
  color: var(--sonar-soft);
}

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

.page-faq .qa__a {
  max-width: 68ch;
  padding: 0 2.6rem 1.3rem .1rem;
  font-size: .9375rem;
  line-height: 1.78;
  color: var(--text);
}

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

/* ---------- 类目配图 ---------- */
.page-faq .faq-media {
  margin: 1.6rem 0 0;
  max-width: 290px;
}

.page-faq .faq-media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  object-fit: cover;
}

.page-faq .faq-media figcaption {
  margin-top: .6rem;
  font-size: .8125rem;
  line-height: 1.6;
  color: var(--text-mute);
}

/* ---------- 人工通道 ---------- */
.page-faq .faq-help {
  position: relative;
  overflow: hidden;
  padding-block: 3.25rem 3.5rem;
  background: var(--ink-850);
}

.page-faq .faq-help::before {
  content: "";
  position: absolute;
  left: -12%;
  right: -12%;
  top: -120px;
  height: 260px;
  background: radial-gradient(ellipse at 28% 40%, var(--sonar-08), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-help__grid {
  position: relative;
  display: grid;
  gap: 2rem;
}

.page-faq .faq-help__text h2 {
  margin: .55rem 0 1rem;
  max-width: 20ch;
}

.page-faq .faq-help__text .t-body {
  margin: 0 0 .9rem;
  max-width: 62ch;
  color: var(--text);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.6rem;
}

.page-faq .faq-help__side {
  align-self: start;
  padding: 1.4rem 1.5rem 1.5rem;
}

.page-faq .faq-help__side .eyebrow {
  margin: 0;
}

.page-faq .faq-links {
  margin: .85rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-links a {
  display: block;
  padding: .72rem 0;
  border-top: 1px solid var(--line);
  color: var(--text);
  font-size: .9375rem;
  line-height: 1.6;
  text-decoration: none;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-faq .faq-links a:hover {
  color: var(--sonar);
  padding-left: .45rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero__grid {
    padding-block: 3.25rem 2.75rem;
    gap: 1.6rem;
  }

  .page-faq .faq-wave {
    aspect-ratio: 1400 / 520;
  }

  .page-faq .faq-board {
    padding-block: 4.25rem 3.75rem;
  }

  .page-faq .faq-board__head {
    margin-bottom: 2.4rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-cols {
    grid-template-columns: minmax(206px, 244px) minmax(0, 1fr);
    gap: 3.25rem;
  }

  .page-faq .faq-seg {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    position: sticky;
    top: var(--faq-sticky-top);
    border-left: 1px solid var(--line);
  }

  .page-faq .faq-seg .seg-btn {
    width: 100%;
    justify-content: flex-start;
    margin-left: -1px;
    padding: .78rem 1rem .78rem .95rem;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    white-space: normal;
    text-align: left;
  }

  .page-faq .faq-seg .seg-btn:hover {
    background: var(--sonar-06);
  }

  .page-faq .faq-seg .seg-btn[aria-selected="true"] {
    background: var(--sonar-08);
    color: var(--sonar);
    border-left-color: var(--sonar);
  }

  .page-faq .faq-seg .seg-btn[aria-selected="true"] .cmd-index {
    color: var(--sonar-soft);
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .85fr);
    gap: 3.5rem;
    align-items: start;
  }

  .page-faq .faq-help {
    padding-block: 4rem 4.25rem;
  }
}

@media (min-width: 1180px) {
  .page-faq .qa summary {
    font-size: 1.125rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-seg .seg-btn,
  .page-faq .qa summary,
  .page-faq .qa summary::after,
  .page-faq .faq-links a,
  .page-faq .crumbs a {
    transition: none;
  }
}
<<<END>>>