.page-faq {
  background:
    radial-gradient(1100px 560px at 88% -8%, rgba(198, 255, 61, 0.09), transparent 62%),
    radial-gradient(760px 420px at 4% 12%, rgba(255, 138, 61, 0.06), transparent 60%),
    var(--mk-bg);
  color: var(--mk-paper);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq .faq-shell {
  padding-top: clamp(18px, 3.6vw, 34px);
}

.page-faq .faq-crumbs {
  margin-bottom: clamp(14px, 2.4vw, 22px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  border: 1px solid var(--mk-line);
  background: linear-gradient(180deg, rgba(16, 43, 36, 0.92), rgba(11, 31, 26, 0.58));
  padding: clamp(20px, 4vw, 46px);
  box-shadow: var(--mk-shadow);
}

.page-faq .faq-hero::before,
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  border: 1px solid var(--mk-lime);
  opacity: 0.6;
  pointer-events: none;
}

.page-faq .faq-hero::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-faq .faq-hero::after {
  right: -1px;
  bottom: -1px;
  border-top: 0;
  border-left: 0;
}

.page-faq .faq-hero__title {
  font-family: var(--mk-display);
  font-weight: 800;
  font-size: clamp(29px, 4.4vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 14px 0 16px;
  max-width: 24ch;
}

.page-faq .faq-hero__lede {
  max-width: 58ch;
  color: var(--mk-silver);
  line-height: 1.9;
  margin: 0;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 24px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1px solid var(--mk-line);
  font-family: var(--mk-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mk-muted);
}

.page-faq .faq-hero__meta .mk-num {
  color: var(--mk-lime);
  font-size: 15px;
  margin-right: 4px;
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-body {
  margin-top: clamp(24px, 4vw, 48px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 40px);
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: 250px minmax(0, 1fr);
    align-items: start;
  }
}

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

/* ---------- 左侧问题目录 ---------- */
.page-faq .faq-index {
  border: 1px solid var(--mk-line);
  background: rgba(16, 43, 36, 0.74);
  padding: 18px 16px;
}

@media (min-width: 960px) {
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--mk-sticky-top) + 16px);
  }
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--mk-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mk-lime);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border-left: 1px solid var(--mk-line);
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 2.4em minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  margin-left: -1px;
  padding: 9px 10px 9px 12px;
  border-left: 2px solid transparent;
  color: var(--mk-silver);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.45;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-index__link:hover {
  color: var(--mk-paper);
  border-left-color: var(--mk-lime);
  background: rgba(198, 255, 61, 0.07);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--mk-lime);
  outline-offset: 2px;
}

.page-faq .faq-index__no {
  font-family: var(--mk-mono);
  font-size: 12px;
  color: var(--mk-muted);
  transition: color 0.2s ease;
}

.page-faq .faq-index__link:hover .faq-index__no {
  color: var(--mk-lime);
}

.page-faq .faq-index__hint {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--mk-line);
  font-size: 12px;
  line-height: 1.75;
  color: var(--mk-muted);
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  scroll-margin-top: calc(var(--mk-sticky-top) + 20px);
}

.page-faq .faq-section + .faq-section {
  margin-top: clamp(30px, 4.4vw, 52px);
}

.page-faq .faq-section__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--mk-line-strong);
}

.page-faq .faq-section__no {
  font-family: var(--mk-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--mk-lime);
}

.page-faq .faq-section__head h2 {
  margin: 0;
  font-family: var(--mk-display);
  font-weight: 800;
  font-size: clamp(22px, 2.8vw, 33px);
  line-height: 1.2;
  letter-spacing: -0.005em;
}

.page-faq .faq-section__lede {
  margin: 0 0 18px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mk-silver);
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item {
  border: 1px solid var(--mk-line);
  border-left: 2px solid rgba(198, 255, 61, 0.32);
  background: rgba(16, 43, 36, 0.55);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-item + .faq-item {
  margin-top: 8px;
}

.page-faq .faq-item:hover {
  border-color: var(--mk-line-strong);
  border-left-color: var(--mk-lime);
}

.page-faq .faq-item[open] {
  border-left-color: var(--mk-lime);
  background: rgba(16, 43, 36, 0.9);
}

.page-faq .faq-item > summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 2.7em minmax(0, 1fr) 1em;
  gap: 10px;
  align-items: baseline;
  padding: 13px 15px;
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--mk-paper);
}

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

.page-faq .faq-item > summary::after {
  content: "+";
  font-family: var(--mk-mono);
  font-size: 14px;
  color: var(--mk-lime);
  text-align: right;
}

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

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--mk-lime);
  outline-offset: -2px;
}

.page-faq .faq-item__no {
  font-family: var(--mk-mono);
  font-size: 12px;
  color: var(--mk-muted);
}

.page-faq .faq-item__body {
  padding: 0 15px 18px;
  border-top: 1px solid var(--mk-line);
  margin-top: 2px;
  padding-top: 14px;
}

/* ---------- 步骤列表 ---------- */
.page-faq .faq-steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-steps > li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 36px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mk-silver);
}

.page-faq .faq-steps > li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  padding: 1px 4px;
  border: 1px solid var(--mk-line-strong);
  font-family: var(--mk-mono);
  font-size: 11px;
  line-height: 1.4;
  color: var(--mk-lime-dim);
}

.page-faq .faq-note {
  margin: 14px 0 0;
  padding: 10px 12px;
  background: rgba(185, 196, 192, 0.07);
  border-left: 2px solid var(--mk-lime-dim);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mk-muted);
}

.page-faq .faq-mail {
  font-family: var(--mk-mono);
  font-size: 14px;
  color: var(--mk-lime);
  word-break: break-all;
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 16px 0 20px;
  border: 1px solid var(--mk-line);
  background: linear-gradient(160deg, rgba(16, 43, 36, 0.95), rgba(5, 10, 8, 0.9));
  overflow: hidden;
}

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

.page-faq .faq-figure__cap {
  padding: 10px 14px;
  border-top: 1px solid var(--mk-line);
  font-family: var(--mk-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--mk-muted);
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 430px) {
  .page-faq .faq-item > summary {
    grid-template-columns: minmax(0, 1fr) 1em;
    row-gap: 4px;
  }

  .page-faq .faq-item__no {
    grid-column: 1 / -1;
  }

  .page-faq .faq-steps > li {
    padding-left: 30px;
    font-size: 14.5px;
  }
}