.page-faq {
  --faq-gap: clamp(18px, 3.4vw, 30px);
  --faq-sec-gap: clamp(34px, 6vw, 60px);
  display: block;
}

.page-faq .faq-top {
  padding-top: clamp(16px, 3.5vw, 30px);
}

.page-faq .crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-faq .crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .crumbs__sep {
  color: var(--line);
}

/* ---------- hero ---------- */

.page-faq .faq-hero {
  display: grid;
  gap: var(--faq-gap);
  align-items: end;
  padding-bottom: clamp(26px, 5vw, 48px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-kicker {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
  margin: 0 0 12px;
}

.page-faq .faq-hero h1 {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(28px, 7vw, 52px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--text);
  max-width: 16em;
}

.page-faq .faq-hero .lede {
  margin: 0;
  font-size: clamp(16px, 4vw, 17px);
  line-height: 1.75;
  color: var(--muted);
  max-width: 46em;
}

.page-faq .faq-hero__node {
  display: inline-block;
  margin: 18px 0 0;
  padding: 5px 10px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--cyan);
  border: 1px solid rgba(37, 227, 196, .38);
  border-radius: var(--r);
  background: rgba(37, 227, 196, .07);
}

.page-faq .faq-hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .05em;
  text-decoration: none;
  padding: 11px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  color: var(--text);
  background: var(--ink-800);
  transition: border-color .2s var(--ease), background-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .btn--primary {
  border-color: rgba(37, 227, 196, .55);
  color: var(--cyan);
  background: rgba(37, 227, 196, .09);
}

.page-faq .btn--warm {
  border-color: rgba(255, 122, 47, .55);
  color: var(--orange);
  background: rgba(255, 122, 47, .09);
}

.page-faq .btn--primary:hover { background: rgba(37, 227, 196, .18); }
.page-faq .btn--warm:hover { background: rgba(255, 122, 47, .18); }
.page-faq .btn:hover { border-color: var(--cyan); }

.page-faq .btn:focus-visible,
.page-faq .faq-cats__link:focus-visible,
.page-faq .faq-quick__link:focus-visible,
.page-faq .faq-cta__side-list a:focus-visible,
.page-faq .faq-item__head:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- figures ---------- */

.page-faq .faq-figure {
  margin: 0;
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background:
    linear-gradient(150deg, rgba(37, 227, 196, .08), rgba(10, 23, 38, 0) 58%),
    var(--ink-800);
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure__cap {
  padding: 11px 14px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* ---------- 布局主体 ---------- */

.page-faq .faq-body {
  display: grid;
  gap: clamp(22px, 4vw, 42px);
  padding-top: clamp(24px, 5vw, 44px);
  padding-bottom: clamp(44px, 8vw, 84px);
}

.page-faq .faq-body > * {
  min-width: 0;
}

.page-faq .faq-main {
  display: grid;
  gap: var(--faq-sec-gap);
  min-width: 0;
}

/* ---------- 分类导航 ---------- */

.page-faq .faq-cats {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  max-width: 100%;
  padding: 2px 0 10px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-faq .faq-cats::-webkit-scrollbar { display: none; }

.page-faq .faq-cats__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  flex: none;
  white-space: nowrap;
  padding: 9px 14px;
  font-size: 13px;
  font-family: var(--font-head);
  font-weight: 700;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--ink-800);
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-cats__link .mono {
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-cats__link:hover {
  color: var(--text);
  border-color: rgba(37, 227, 196, .5);
  background: rgba(37, 227, 196, .07);
}

/* ---------- 章节 ---------- */

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

.page-faq .faq-sec__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-sec__num {
  flex: none;
  font-size: clamp(20px, 5vw, 27px);
  line-height: 1.05;
  color: var(--cyan);
  padding-top: 1px;
}

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

.page-faq .faq-sec__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(19px, 4.6vw, 24px);
  letter-spacing: -.01em;
  color: var(--text);
}

.page-faq .faq-sec__sub {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 折叠问答 ---------- */

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

.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  background: transparent;
  transition: background-color .24s var(--ease), border-left-color .24s var(--ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--cyan);
  background: rgba(18, 38, 58, .55);
}

.page-faq .faq-item__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 34px 15px 14px;
  cursor: pointer;
  list-style: none;
  position: relative;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  transition: color .2s var(--ease);
}

.page-faq .faq-item__head::-webkit-details-marker { display: none; }
.page-faq .faq-item__head:hover { color: var(--cyan); }

.page-faq .faq-item__head::after {
  content: "+";
  position: absolute;
  right: 12px;
  top: 14px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

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

.page-faq .faq-item__num {
  flex: none;
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--muted);
  padding-top: 3px;
}

.page-faq .faq-item[open] > .faq-item__head .faq-item__num { color: var(--cyan); }

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

.page-faq .faq-item__a {
  padding: 0 34px 18px 14px;
  border-left: 0;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text);
  max-width: 44em;
}

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

/* ---------- 口径速查带 ---------- */

.page-faq .faq-quick {
  border: 1px solid var(--line);
  border-top: 3px solid var(--orange);
  border-radius: var(--r);
  background:
    linear-gradient(158deg, rgba(255, 122, 47, .13), rgba(10, 23, 38, 0) 62%),
    var(--ink-800);
  padding: clamp(15px, 3vw, 22px);
}

.page-faq .faq-quick__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 13px;
  color: var(--text);
}

.page-faq .faq-quick__head .mono {
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--orange);
}

.page-faq .faq-quick__hint {
  color: var(--muted);
  font-size: 12px;
}

.page-faq .faq-quick__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-quick__grid li {
  background: var(--ink-900);
  min-width: 0;
}

.page-faq .faq-quick__link {
  display: block;
  padding: 13px 14px;
  text-decoration: none;
  color: var(--text);
  transition: background-color .2s var(--ease);
}

.page-faq .faq-quick__link:hover {
  background: rgba(255, 122, 47, .1);
}

.page-faq .faq-quick__k {
  display: block;
  font-size: 13px;
  letter-spacing: .03em;
  color: var(--cyan);
  margin-bottom: 5px;
}

.page-faq .faq-quick__v {
  display: block;
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- 判定顺序 SVG ---------- */

.page-faq .faq-flow {
  margin: 0 0 22px;
  padding: clamp(14px, 3vw, 20px);
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--ink-900);
}

.page-faq .faq-flow svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.page-faq .faq-flow rect {
  fill: var(--panel);
  stroke: var(--line);
  stroke-width: 2;
}

.page-faq .faq-flow__arrow {
  stroke: var(--line);
  stroke-width: 2;
}

.page-faq .faq-flow__head {
  fill: var(--orange);
}

.page-faq .faq-flow__k {
  fill: var(--cyan);
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
}

.page-faq .faq-flow__v {
  fill: var(--muted);
  font-family: var(--font-body);
  font-size: 12px;
}

.page-faq .faq-flow__cap {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 访问与显示 ---------- */

.page-faq .faq-access {
  display: grid;
  gap: clamp(20px, 4vw, 30px);
}

.page-faq .faq-access__lead {
  margin: 0 0 20px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--text);
  max-width: 44em;
}

.page-faq .faq-list--tight .faq-item__head {
  font-size: 15px;
  padding: 13px 32px 13px 12px;
}

.page-faq .faq-list--tight .faq-item__a {
  padding: 0 32px 15px 12px;
}

.page-faq .faq-figure--phone {
  max-width: 420px;
  border-top: 3px solid var(--violet);
  background:
    linear-gradient(200deg, rgba(124, 107, 255, .14), rgba(10, 23, 38, 0) 60%),
    var(--ink-800);
}

/* ---------- 同步与更新 ---------- */

.page-faq .faq-sync {
  display: grid;
  gap: 18px;
  margin-bottom: 22px;
}

.page-faq .faq-sync__note {
  position: relative;
  padding: 16px 18px 16px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--violet);
  border-radius: var(--r);
  background: var(--panel);
}

.page-faq .faq-sync__note p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
  max-width: 44em;
}

.page-faq .faq-sync__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
}

.page-faq .faq-sync__cell {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 14px 15px;
  background: var(--ink-800);
  min-width: 0;
}

.page-faq .faq-sync__k {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-faq .faq-sync__v {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.4;
  color: var(--cyan);
  word-break: break-word;
}

/* ---------- 反馈收束 ---------- */

.page-faq .faq-sec--cta .faq-sec__head {
  border-bottom-color: rgba(255, 122, 47, .45);
}

.page-faq .faq-sec--cta .faq-sec__num {
  color: var(--orange);
}

.page-faq .faq-cta {
  display: grid;
  gap: clamp(18px, 3.5vw, 28px);
}

.page-faq .faq-cta__main {
  padding: clamp(18px, 3.6vw, 28px);
  border: 1px solid var(--line);
  border-top: 3px solid var(--orange);
  border-radius: var(--r);
  background:
    linear-gradient(160deg, rgba(255, 122, 47, .12), rgba(10, 23, 38, 0) 58%),
    var(--ink-800);
}

.page-faq .faq-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(18px, 4.4vw, 21px);
  color: var(--text);
}

.page-faq .faq-cta__text {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text);
  max-width: 42em;
}

.page-faq .faq-cta__list {
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .faq-cta__list li {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-cta__list .mono {
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--orange);
}

.page-faq .faq-cta__side {
  padding: clamp(16px, 3vw, 22px);
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--panel);
}

.page-faq .faq-cta__side-title {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

.page-faq .faq-cta__side-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-faq .faq-cta__side-list a {
  display: block;
  padding: 11px 12px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
  text-decoration: none;
  border-left: 2px solid var(--line);
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-cta__side-list a:hover {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(37, 227, 196, .06);
}

/* ---------- 桌面端 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-quick__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-sync__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-access {
    grid-template-columns: minmax(0, 1fr) minmax(0, .62fr);
    align-items: start;
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .84fr);
    gap: clamp(30px, 5vw, 62px);
  }

  .page-faq .faq-body {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-faq .faq-cats {
    display: grid;
    gap: 2px;
    position: sticky;
    top: 92px;
    align-self: start;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-cats__link {
    display: flex;
    justify-content: flex-start;
    padding: 10px 0 10px 14px;
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0;
    background: transparent;
  }

  .page-faq .faq-cats__link:hover {
    border-left-color: var(--cyan);
    background: transparent;
  }

  .page-faq .faq-flow {
    padding: clamp(18px, 2.4vw, 26px);
  }

  .page-faq .faq-figure--phone {
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}