.page-faq {
  --faq-aside: 236px;
  --faq-radius: var(--ml-radius);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(16px, 3vw, 28px);
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--ml-sage);
}

.page-faq .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--ml-line);
}

.page-faq .breadcrumbs__item a {
  color: var(--ml-cyan-soft);
  text-decoration: none;
}

.page-faq .breadcrumbs__item a:hover {
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-intro {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  padding: clamp(20px, 4vw, 44px);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(59, 240, 208, 0.14) 0%, rgba(59, 240, 208, 0) 55%),
    linear-gradient(155deg, #0d2b22 0%, var(--ml-panel) 58%, #0a221b 100%);
  border: 1px solid var(--ml-line);
  border-radius: var(--faq-radius);
  box-shadow: var(--ml-shadow);
}

.page-faq .faq-intro h1 {
  margin: 8px 0 14px;
  font-family: var(--ml-font-display);
  font-size: clamp(30px, 7.4vw, 60px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: 0.01em;
  color: var(--ml-chalk);
}

.page-faq .faq-intro .lede {
  max-width: 60ch;
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--ml-sage);
}

.page-faq .faq-jump {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--ml-line);
  border: 1px solid var(--ml-line);
  border-radius: var(--faq-radius);
  overflow: hidden;
}

.page-faq .faq-jump a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 13px 16px;
  background: rgba(7, 26, 20, 0.72);
  color: var(--ml-chalk);
  font-size: 14px;
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: border-color 180ms ease, background-color 180ms ease;
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  background: rgba(59, 240, 208, 0.09);
  border-left-color: var(--ml-cyan);
}

.page-faq .faq-jump .mono {
  color: var(--ml-cyan);
  font-size: 12px;
  letter-spacing: 0.08em;
}

/* ---------- 章节标题组 ---------- */
.page-faq .faq-section-head {
  margin: clamp(36px, 6vw, 64px) 0 clamp(16px, 2.4vw, 24px);
}

.page-faq .faq-section-head .section-title {
  margin: 6px 0 0;
  font-family: var(--ml-font-display);
  font-size: clamp(24px, 4.4vw, 38px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--ml-chalk);
}

/* ---------- 三步走 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--ml-line);
  border: 1px solid var(--ml-line);
  border-radius: var(--faq-radius);
  overflow: hidden;
}

.page-faq .faq-step {
  padding: clamp(18px, 3vw, 26px);
  background: var(--ml-panel);
}

.page-faq .faq-step__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--ml-font-mono);
  font-size: clamp(34px, 7vw, 50px);
  font-weight: 700;
  line-height: 0.9;
  color: var(--ml-cyan);
}

.page-faq .faq-step__title {
  margin: 0 0 8px;
  font-family: var(--ml-font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ml-chalk);
}

.page-faq .faq-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ml-sage);
}

/* ---------- 四组主题索引 ---------- */
.page-faq .faq-topics {
  display: grid;
  gap: 10px;
}

.page-faq .faq-topic {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: rgba(15, 42, 33, 0.78);
  border: 1px solid var(--ml-line);
  border-radius: var(--faq-radius);
  color: var(--ml-chalk);
  text-decoration: none;
  transition: border-color 180ms ease, transform 180ms ease, background-color 180ms ease;
}

.page-faq .faq-topic:hover,
.page-faq .faq-topic:focus-visible {
  border-color: var(--ml-cyan);
  background: rgba(59, 240, 208, 0.08);
}

.page-faq .faq-topic__code {
  font-size: 22px;
  font-weight: 700;
  color: var(--ml-cyan);
  padding-right: 12px;
  border-right: 1px solid var(--ml-line);
}

.page-faq .faq-topic__body {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.page-faq .faq-topic__body strong {
  font-family: var(--ml-font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-faq .faq-topic__meta {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ml-sage);
}

.page-faq .faq-topic__count {
  font-family: var(--ml-font-mono);
  font-size: 12px;
  color: var(--ml-orange);
  white-space: nowrap;
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(36px, 6vw, 64px);
}

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

.page-faq .faq-group {
  margin-bottom: clamp(32px, 5vw, 56px);
  scroll-margin-top: 88px;
}

.page-faq .faq-group__head {
  display: grid;
  gap: 6px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--ml-line);
}

.page-faq .faq-group__code {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--ml-orange);
}

.page-faq .faq-group__head .section-title {
  margin: 0;
  font-family: var(--ml-font-display);
  font-size: clamp(22px, 3.6vw, 30px);
  font-weight: 700;
  color: var(--ml-chalk);
}

.page-faq .faq-group__head .note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ml-sage);
}

.page-faq .faq-figure {
  margin: 18px 0 6px;
  border: 1px solid var(--ml-line);
  border-radius: var(--faq-radius);
  overflow: hidden;
  background: #0a221b;
}

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

.page-faq .faq-figure__cap {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ml-sage);
  border-top: 1px solid var(--ml-line);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-q {
  border-bottom: 1px solid var(--ml-line);
}

.page-faq .faq-q summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 4px;
  cursor: pointer;
  list-style: none;
  transition: color 160ms ease;
}

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

.page-faq .faq-q summary:hover .faq-q__text,
.page-faq .faq-q summary:focus-visible .faq-q__text {
  color: var(--ml-cyan);
}

.page-faq .faq-q summary:focus-visible {
  outline: 2px solid var(--ml-cyan);
  outline-offset: 2px;
}

.page-faq .faq-q__text {
  font-size: 15px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--ml-chalk);
  transition: color 160ms ease;
}

.page-faq .faq-q__mark {
  flex: none;
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 4px;
}

.page-faq .faq-q__mark::before,
.page-faq .faq-q__mark::after {
  content: "";
  position: absolute;
  background: var(--ml-cyan);
  border-radius: 1px;
  transition: transform 200ms ease, background-color 200ms ease;
}

.page-faq .faq-q__mark::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-faq .faq-q__mark::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
}

.page-faq .faq-q[open] .faq-q__mark::after {
  transform: scaleY(0);
}

.page-faq .faq-q[open] .faq-q__mark::before {
  background: var(--ml-orange);
}

.page-faq .faq-q[open] summary {
  border-left: 2px solid var(--ml-orange);
  padding-left: 12px;
}

.page-faq .faq-q__answer {
  padding: 0 4px 18px 12px;
  border-left: 2px solid transparent;
}

.page-faq .faq-q[open] .faq-q__answer {
  animation: faq-fade 260ms ease both;
}

.page-faq .faq-q__answer p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ml-sage);
}

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

@keyframes faq-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ---------- 联系卡 ---------- */
.page-faq .faq-contact {
  margin: 18px 0 8px;
  padding: 18px;
  background: rgba(255, 138, 61, 0.07);
  border: 1px solid var(--ml-orange-deep);
  border-radius: var(--faq-radius);
}

.page-faq .faq-contact__row {
  display: grid;
  gap: 4px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--ml-line);
}

.page-faq .faq-contact__row:last-of-type {
  border-bottom: 0;
}

.page-faq .faq-contact__k {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ml-sage);
}

.page-faq .faq-contact__v {
  font-size: 15px;
  color: var(--ml-chalk);
  word-break: break-word;
}

.page-faq .faq-contact__note {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--ml-sage);
}

/* ---------- 旁注 ---------- */
.page-faq .faq-aside {
  display: grid;
  gap: 14px;
  align-content: start;
  min-width: 0;
}

.page-faq .faq-aside__block {
  padding: 16px;
  background: rgba(15, 42, 33, 0.7);
  border: 1px solid var(--ml-line);
  border-radius: var(--faq-radius);
}

.page-faq .faq-aside__block--amber {
  border-color: var(--ml-orange-deep);
}

.page-faq .faq-aside__list {
  display: grid;
  gap: 10px;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  line-height: 1.5;
  color: var(--ml-sage);
}

.page-faq .faq-aside__list .mono {
  display: inline-block;
  min-width: 56px;
  color: var(--ml-cyan-soft);
  font-size: 12px;
}

.page-faq .faq-aside__k {
  margin: 0 0 4px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ml-sage);
}

.page-faq .faq-aside__big {
  margin: 0 0 6px;
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--ml-orange);
}

.page-faq .faq-aside__block .note {
  margin: 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--ml-sage);
}

/* ---------- 更多支持 ---------- */
.page-faq .faq-more__grid {
  display: grid;
  gap: 12px;
}

.page-faq .faq-more__card {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: clamp(18px, 3vw, 26px);
  background: var(--ml-panel);
  border: 1px solid var(--ml-line);
  border-radius: var(--faq-radius);
}

.page-faq .faq-more__card h3 {
  margin: 0;
  font-family: var(--ml-font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ml-chalk);
}

.page-faq .faq-more__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ml-sage);
}

.page-faq .faq-more__card .btn {
  justify-self: start;
  margin-top: 4px;
}

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

  .page-faq .faq-topics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-more__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-intro {
    grid-template-columns: minmax(0, 1.55fr) minmax(220px, 1fr);
    align-items: start;
  }

  .page-faq .faq-contact__row {
    grid-template-columns: 88px minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) var(--faq-aside);
    align-items: start;
  }

  .page-faq .faq-aside {
    position: sticky;
    top: 24px;
  }

  .page-faq .faq-q__text {
    font-size: 16px;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-topic {
    padding: 18px 22px;
  }

  .page-faq .faq-figure--after {
    margin-top: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-q[open] .faq-q__answer {
    animation: none;
  }

  .page-faq .faq-topic,
  .page-faq .faq-jump a,
  .page-faq .faq-q__mark::before,
  .page-faq .faq-q__mark::after {
    transition: none;
  }
}