.page-faq {
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  padding-block: 18px 0;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-block: clamp(24px, 4vw, 48px) clamp(32px, 6vw, 68px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
}

.page-faq .faq-hero .u-eyebrow {
  color: var(--brick);
}

.page-faq .faq-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(38px, 8.4vw, 104px);
  line-height: 0.96;
  letter-spacing: -0.01em;
  color: var(--green);
  margin: 12px 0 20px;
}

.page-faq .faq-hero__lead {
  max-width: 46ch;
  margin: 0;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--ink);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  margin: 30px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line-strong);
}

.page-faq .faq-hero__stats dt {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--sage);
}

.page-faq .faq-hero__stats dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 17px;
  color: var(--green);
}

.page-faq .faq-hero__figure {
  position: relative;
  margin: 0;
}

.page-faq .faq-hero__figure::before {
  content: "";
  position: absolute;
  top: -10px;
  right: -10px;
  width: 88px;
  height: 88px;
  border-top: 2px solid var(--cyan);
  border-right: 2px solid var(--cyan);
  pointer-events: none;
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  filter: saturate(0.85) contrast(1.02);
}

/* ---------- 分类胶囊条 ---------- */
.page-faq .faq-index {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 0 20px;
  scrollbar-width: none;
}

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

.page-faq .faq-index__link {
  flex: none;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 200ms var(--ease), color 200ms var(--ease),
    border-color 200ms var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--green);
  border-color: var(--green);
  color: var(--paper);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  color: var(--brick);
}

.page-faq .faq-index__link:hover .faq-index__num {
  color: var(--cyan);
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-groups {
  padding-top: clamp(16px, 3vw, 32px);
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(40px, 7vw, 80px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--green);
}

.page-faq .faq-group__head .u-eyebrow {
  color: var(--sage);
}

.page-faq .faq-group__title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(23px, 3.4vw, 36px);
  line-height: 1.08;
  color: var(--green);
  margin: 6px 0 0;
}

.page-faq .faq-group__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--sage);
  white-space: nowrap;
}

/* ---------- 可展开问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 20px;
  align-items: center;
  gap: 10px;
  padding: 18px 8px;
  cursor: pointer;
  list-style: none;
  background: transparent;
  transition: background-color 220ms var(--ease);
}

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

.page-faq .faq-item__q:hover {
  background: var(--paper-2);
}

.page-faq .faq-item[open] > .faq-item__q {
  background: var(--mist);
}

.page-faq .faq-item__idx {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--brick);
}

.page-faq .faq-item__text {
  margin: 0;
  font-size: clamp(15px, 1.7vw, 18px);
  font-weight: 500;
  line-height: 1.55;
  color: var(--ink);
}

.page-faq .faq-item[open] .faq-item__text {
  color: var(--green-deep);
}

.page-faq .faq-item__arrow {
  position: relative;
  width: 20px;
  height: 20px;
  color: var(--green);
}

.page-faq .faq-item__arrow::before,
.page-faq .faq-item__arrow::after {
  content: "";
  position: absolute;
  background: currentColor;
  transition: transform 220ms var(--ease), opacity 220ms var(--ease);
}

.page-faq .faq-item__arrow::before {
  top: 9px;
  left: 0;
  width: 20px;
  height: 2px;
}

.page-faq .faq-item__arrow::after {
  top: 0;
  left: 9px;
  width: 2px;
  height: 20px;
}

.page-faq .faq-item[open] .faq-item__arrow::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__a {
  padding: 4px 8px 24px;
}

.page-faq .faq-item[open] .faq-item__a {
  animation: faq-drop 240ms var(--ease);
}

@keyframes faq-drop {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-item__a p {
  margin: 0 0 12px;
  max-width: 74ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

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

.page-faq .faq-item__a a {
  color: var(--green);
  text-decoration: underline;
  text-decoration-color: var(--cyan);
  text-underline-offset: 3px;
}

/* ---------- 区间对照图 ---------- */
.page-faq .faq-caliber {
  display: grid;
  gap: 20px;
  margin: 22px 0 30px;
}

.page-faq .faq-diagram {
  margin: 0;
  padding: 18px 16px 12px;
  background: var(--paper-2);
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-diagram svg {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-faq .faq-diagram figcaption {
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sage);
}

.page-faq .dg-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  fill: var(--sage);
}

.page-faq .dg-scale {
  font-family: var(--font-mono);
  font-size: 12px;
  fill: var(--sage);
}

.page-faq .dg-scale--end {
  text-anchor: end;
}

.page-faq .dg-base {
  fill: var(--paper-3);
}

.page-faq .dg-seg rect {
  fill: var(--green);
  transition: fill 200ms var(--ease);
}

.page-faq .dg-seg text {
  fill: var(--paper);
  font-family: var(--font-text);
  font-size: 14px;
  letter-spacing: 0.06em;
  text-anchor: middle;
  transition: fill 200ms var(--ease);
}

.page-faq .dg-seg:hover rect {
  fill: var(--cyan);
}

.page-faq .dg-seg:hover text {
  fill: var(--green-deep);
}

.page-faq .dg-seg--cup rect {
  fill: var(--slate);
}

.page-faq .dg-seg--cup:hover rect {
  fill: var(--amber);
}

.page-faq .dg-seg--cup:hover text {
  fill: var(--ink);
}

.page-faq .faq-caliber__figure {
  margin: 0;
}

.page-faq .faq-caliber__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  filter: saturate(0.88);
}

/* ---------- 中部引导 ---------- */
.page-faq .faq-lead {
  position: relative;
  overflow: hidden;
  margin-top: clamp(48px, 9vw, 104px);
  padding-block: clamp(72px, 15vw, 150px);
  background: var(--green);
  color: var(--paper);
}

.page-faq .faq-lead::after {
  content: "R30";
  position: absolute;
  right: var(--gutter);
  bottom: -0.16em;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(88px, 22vw, 240px);
  line-height: 1;
  color: rgba(63, 224, 200, 0.13);
  pointer-events: none;
}

.page-faq .faq-lead__inner {
  position: relative;
  z-index: 1;
  max-width: 680px;
}

.page-faq .faq-lead .u-eyebrow {
  color: var(--cyan);
}

.page-faq .faq-lead__title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(28px, 5vw, 52px);
  line-height: 1.06;
  margin: 10px 0 16px;
  color: var(--paper);
}

.page-faq .faq-lead__text {
  margin: 0 0 28px;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(244, 239, 226, 0.82);
}

/* ---------- 收尾与清单 ---------- */
.page-faq .faq-closing {
  display: grid;
  gap: 24px;
  padding-block: clamp(48px, 8vw, 96px);
}

.page-faq .faq-closing .u-eyebrow {
  color: var(--sage);
}

.page-faq .faq-closing__note {
  margin-top: 30px;
  padding: 22px 20px;
  background: var(--paper-2);
  border-left: 3px solid var(--amber);
}

.page-faq .faq-closing__note-title {
  margin: 0 0 16px;
  font-size: 16px;
  font-weight: 600;
  color: var(--green);
}

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

.page-faq .faq-checklist li {
  position: relative;
  padding-left: 22px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

.page-faq .faq-checklist li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  background: var(--brick);
}

/* ---------- 中等屏以上 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-item__q {
    grid-template-columns: 40px minmax(0, 1fr) 22px;
    gap: 14px;
    padding: 20px 12px;
  }

  .page-faq .faq-item__a {
    padding: 4px 32px 26px 54px;
  }

  .page-faq .faq-closing__note {
    padding: 26px 28px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  }

  .page-faq .faq-caliber {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
    gap: 28px;
  }

  .page-faq .faq-closing {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-closing > div:first-child {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

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

  .page-faq .faq-item__arrow::before,
  .page-faq .faq-item__arrow::after,
  .page-faq .dg-seg rect,
  .page-faq .dg-seg text {
    transition: none;
  }
}