.page-faq {
  --faq-axis: 3px;
  --faq-shell-gap: clamp(20px, 4vw, 40px);
}

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

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: clamp(18px, 3vw, 28px);
  padding: clamp(22px, 4vw, 42px);
  border-radius: var(--r-lg);
  color: var(--white);
  background:
    radial-gradient(120% 150% at 96% 4%, rgba(242, 194, 48, 0.26), transparent 58%),
    linear-gradient(140deg, var(--green-deep) 0%, var(--green) 42%, var(--indigo) 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, rgba(245, 247, 244, 0.07) 0 1px, transparent 1px 26px),
    repeating-linear-gradient(90deg, rgba(245, 247, 244, 0.07) 0 1px, transparent 1px 26px);
  pointer-events: none;
}

.page-faq .faq-hero > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--yellow);
}

.page-faq .faq-hero h1 {
  margin: 0 0 14px;
  font-size: clamp(26px, 5.4vw, 52px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 900;
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(245, 247, 244, 0.9);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: rgba(245, 247, 244, 0.82);
}

.page-faq .faq-hero__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 21px;
  font-weight: 700;
  color: var(--yellow);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 5;
  object-fit: cover;
  border-radius: var(--r-md);
  border: 1px solid var(--line-invert);
}

/* ---------- 分类索引 ---------- */

.page-faq .faq-index {
  display: flex;
  gap: 8px;
  margin-top: clamp(16px, 2.6vw, 24px);
  padding: 2px 0 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__item {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  color: var(--ink);
  font-size: 13.5px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.18s ease, color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-index__item:hover,
.page-faq .faq-index__item:focus-visible {
  border-color: var(--green);
  background: var(--mint);
  color: var(--green-deep);
}

.page-faq .faq-index__n {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--yellow-deep);
}

/* ---------- 章节 ---------- */

.page-faq .faq-group {
  margin-top: clamp(26px, 4.4vw, 46px);
  scroll-margin-top: calc(var(--bar-h) + 20px);
}

.page-faq .faq-divider {
  height: 6px;
  width: 100%;
  margin: clamp(28px, 4.6vw, 52px) 0 0;
  border: 0;
  border-radius: 3px;
  background: var(--glow);
  opacity: 0.85;
}

.page-faq .section-title {
  max-width: 30ch;
}

.page-faq .section-head .lede {
  max-width: 66ch;
}

/* ---------- 问答折叠块 ---------- */

.page-faq .qa-list {
  display: grid;
  gap: 10px;
  margin-top: clamp(16px, 2.6vw, 24px);
}

.page-faq .qa-item {
  border-left: var(--faq-axis) solid var(--line-strong);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: var(--white);
  box-shadow: 0 1px 0 rgba(10, 13, 16, 0.06);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.page-faq .qa-item:hover {
  transform: translateX(2px);
  box-shadow: 0 4px 14px rgba(10, 13, 16, 0.09);
}

.page-faq .qa-item[open] {
  border-left-color: var(--yellow);
  box-shadow: 0 4px 16px rgba(10, 13, 16, 0.1);
}

.page-faq .qa-q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
}

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

.page-faq .qa-q:focus-visible {
  outline: 2px solid var(--yellow);
  outline-offset: -2px;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
}

.page-faq .qa-q::after {
  content: "+";
  margin-left: auto;
  padding-left: 10px;
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1;
  color: var(--green);
  flex: 0 0 auto;
}

.page-faq .qa-item[open] .qa-q::after {
  content: "\2212";
  color: var(--yellow-deep);
}

.page-faq .qa-no {
  flex: 0 0 auto;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .qa-item[open] .qa-no {
  color: var(--yellow-deep);
}

.page-faq .qa-t {
  min-width: 0;
}

.page-faq .qa-a {
  margin: 0 16px 16px;
  padding-top: 13px;
  border-top: 1px dashed var(--line);
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

.page-faq .qa-a p {
  margin: 0;
}

.page-faq .qa-a p + p {
  margin-top: 10px;
}

/* ---------- 术语注释块 ---------- */

.page-faq .faq-term {
  margin-top: clamp(18px, 2.8vw, 26px);
  padding: clamp(16px, 2.4vw, 24px);
  border-radius: var(--r-md);
  border-left: 4px solid var(--wine);
  background: var(--mint);
}

.page-faq .faq-term__label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--wine);
}

.page-faq .faq-term__label::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--wine);
}

.page-faq .faq-term__list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-term__item {
  padding-left: 14px;
  border-left: 1px solid rgba(12, 107, 63, 0.28);
}

.page-faq .faq-term__name {
  margin: 0 0 4px;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--green-deep);
}

.page-faq .faq-term__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- 示意图 ---------- */

.page-faq .faq-figure {
  margin: clamp(18px, 3vw, 28px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--white);
  overflow: hidden;
}

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

.page-faq .faq-figure__caption,
.page-faq .faq-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 后续动作 ---------- */

.page-faq .faq-next {
  display: grid;
  gap: 14px;
  margin-top: clamp(18px, 2.8vw, 26px);
  padding: clamp(16px, 2.4vw, 24px);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--white);
}

.page-faq .faq-next__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 术语速查 ---------- */

.page-faq .term-board {
  display: grid;
  gap: 0;
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  border-top: 1px solid var(--line-strong);
}

.page-faq .term-board__item {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .term-board__term {
  font-size: 15px;
  font-weight: 700;
  color: var(--green-deep);
}

.page-faq .term-board__def {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink);
}

.page-faq .faq-tail {
  margin: clamp(18px, 2.8vw, 26px) 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--wine);
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-hero__body {
    max-width: 74ch;
  }

  .page-faq .faq-term__list {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 14px 20px;
  }

  .page-faq .term-board__item {
    grid-template-columns: minmax(140px, 200px) 1fr;
    gap: 18px;
    align-items: baseline;
  }

  .page-faq .faq-next {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
}

@media (min-width: 1040px) {
  .page-faq .qa-q {
    padding: 18px 22px;
    font-size: 16.5px;
  }

  .page-faq .qa-a {
    margin: 0 22px 20px;
    font-size: 15.5px;
  }

  .page-faq .faq-hero__facts {
    gap: 12px 34px;
  }

  .page-faq .faq-figure {
    margin-left: 8%;
    margin-right: 4%;
  }
}