.page-faq {
  --faq-line: rgba(138, 107, 20, .3);
  --faq-soft: rgba(74, 74, 74, .14);
  background: var(--sand);
  color: var(--rock);
  padding-bottom: clamp(48px, 8vw, 104px);
}

.page-faq [hidden] {
  display: none !important;
}

.page-faq .breadcrumb {
  padding-top: clamp(18px, 3.5vw, 30px);
  font-size: 13px;
}

/* ===== 首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 4.5vw, 54px) 0 clamp(42px, 7vw, 92px);
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: 20px;
  align-items: start;
}

.page-faq .faq-hero__stamp {
  margin: 0;
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--gold-deep);
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 20ch;
  color: var(--ink);
}

.page-faq .faq-hero__rule {
  margin: 0;
  height: 1px;
  border: 0;
  width: min(100%, 520px);
  background: linear-gradient(90deg, var(--gold), rgba(201, 162, 39, 0));
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 56ch;
  color: var(--rock);
}

.page-faq .faq-hero__anno {
  display: none;
}

/* ===== 章节索引 ===== */
.page-faq .faq-index {
  padding-bottom: clamp(36px, 6vw, 76px);
}

.page-faq .faq-index .toc {
  border-top: 1px solid var(--gold);
  padding-top: 18px;
}

.page-faq .faq-index .toc__title {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--gold-deep);
}

.page-faq .faq-index .toc__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-index .toc__list a {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--faq-soft);
  color: var(--rock);
  text-decoration: none;
  font-size: 15px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-index .toc__list a .mono {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold);
  min-width: 22px;
}

.page-faq .faq-index .toc__list a:hover,
.page-faq .faq-index .toc__list a.is-active {
  color: var(--ink);
  border-bottom-color: var(--gold);
}

/* ===== 筛选 ===== */
.page-faq .faq-zones {
  padding-bottom: clamp(44px, 7vw, 92px);
}

.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--gold);
  margin-bottom: clamp(30px, 5vw, 56px);
}

.page-faq .faq-filter__label {
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--rock-2);
  margin-right: 8px;
}

.page-faq .filter-btn {
  font-size: 13.5px;
  letter-spacing: .05em;
}

/* ===== 展区 ===== */
.page-faq .zone-stack {
  display: grid;
  gap: clamp(52px, 8vw, 108px);
}

.page-faq .zone {
  display: grid;
  gap: 16px;
}

.page-faq .zone__label {
  margin: 0;
  display: inline-block;
  justify-self: start;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--gold-deep);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--gold);
}

.page-faq .zone__main {
  display: grid;
  gap: 20px;
}

.page-faq .zone__q {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(24px, 4.6vw, 40px);
  font-weight: 900;
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .zone__a {
  margin: 0;
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--rock);
}

.page-faq .zone__anchor {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 20px;
  padding-top: 4px;
}

.page-faq .zone__anchor .figure-xl {
  font-size: clamp(72px, 14vw, 168px);
  line-height: .84;
  letter-spacing: -.03em;
  color: var(--ink);
}

.page-faq .zone__anchor-note {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--rock-2);
}

.page-faq .zone__more {
  padding-top: 4px;
}

.page-faq .zone__more a {
  display: inline-block;
  font-size: 14px;
  color: var(--gold-deep);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid rgba(201, 162, 39, .5);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .zone__more a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* ===== 系数刻度 ===== */
.page-faq .coe {
  margin: 0;
  padding: clamp(18px, 3vw, 34px) clamp(12px, 2.4vw, 30px) clamp(12px, 2vw, 20px);
  background: var(--green);
  border-radius: var(--r-md);
}

.page-faq .coe-scale {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .coe-band {
  fill: rgba(201, 162, 39, .26);
}

.page-faq .coe-axis {
  stroke: var(--gold);
  stroke-width: 2;
}

.page-faq .coe-ticks line {
  stroke: var(--gold);
  stroke-width: 2;
}

.page-faq .coe-dot {
  fill: var(--teal);
}

.page-faq .coe-lab {
  fill: rgba(242, 227, 198, .88);
  font-family: var(--font-mono);
  font-size: 22px;
  font-variant-numeric: tabular-nums;
}

.page-faq .coe-lab--base {
  fill: var(--teal);
}

.page-faq .coe-anno {
  fill: var(--gold);
  font-family: var(--font-mono);
  font-size: 17px;
  letter-spacing: .08em;
}

.page-faq .coe-sub {
  fill: rgba(242, 227, 198, .52);
  font-family: var(--font-mono);
  font-size: 16px;
}

.page-faq .coe figcaption {
  margin-top: 12px;
  color: rgba(242, 227, 198, .6);
}

/* ===== 折叠问答 ===== */
.page-faq .qa-fold {
  border-top: 1px solid var(--faq-soft);
  padding: 14px 0;
}

.page-faq .qa-fold:last-of-type {
  border-bottom: 1px solid var(--faq-soft);
}

.page-faq .qa-fold__q {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .qa-fold__q::after {
  content: "+";
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 18px;
  color: var(--gold);
  line-height: 1;
}

.page-faq .qa-fold[open] .qa-fold__q::after {
  content: "–";
}

.page-faq .qa-fold__q:hover {
  color: var(--gold-deep);
}

.page-faq .qa-fold__a {
  margin: 10px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--rock);
}

/* ===== 三步 ===== */
.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .step {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  column-gap: 16px;
  row-gap: 4px;
  padding: 20px 0;
  border-top: 1px solid var(--faq-soft);
}

.page-faq .step:last-child {
  border-bottom: 1px solid var(--faq-soft);
}

.page-faq .step__num {
  grid-column: 1;
  grid-row: 1 / span 2;
  padding-top: 4px;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--gold-deep);
}

.page-faq .step__title {
  grid-column: 2;
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .step__text {
  grid-column: 2;
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--rock);
}

/* ===== 编号牌 ===== */
.page-faq .code-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 18px 0;
  border-top: 1px solid var(--faq-soft);
  border-bottom: 1px solid var(--faq-soft);
}

.page-faq .code-strip__item {
  display: inline-block;
  padding: 7px 13px;
  border-radius: var(--r-sm);
  background: var(--green);
  color: var(--sand-2);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13.5px;
  letter-spacing: .08em;
}

/* ===== 三种情形 ===== */
.page-faq .cases {
  display: grid;
  gap: 0;
}

.page-faq .case {
  padding: 22px 0;
  border-top: 1px solid var(--faq-soft);
}

.page-faq .case:last-child {
  border-bottom: 1px solid var(--faq-soft);
}

.page-faq .case__code {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--rock-2);
}

.page-faq .case--flag .case__code {
  color: var(--earth);
}

.page-faq .case__title {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .case__text {
  margin: 0;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--rock);
}

/* ===== 收尾通道 ===== */
.page-faq .faq-final {
  padding-top: clamp(8px, 2vw, 24px);
}

.page-faq .faq-final__panel {
  position: relative;
  padding: clamp(28px, 5vw, 68px);
  border-radius: var(--r-lg);
  background: var(--green);
  color: var(--sand-2);
}

.page-faq .faq-final__anno {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--gold);
}

.page-faq .faq-final__panel .section-title {
  margin: 0 0 18px;
  color: var(--sand-2);
}

.page-faq .faq-final__text {
  margin: 0 0 26px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(242, 227, 198, .82);
}

.page-faq .faq-final__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.page-faq .faq-final__panel .btn--ghost {
  border-color: rgba(242, 227, 198, .42);
  color: var(--sand-2);
}

.page-faq .faq-final__panel .btn--ghost:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.page-faq .faq-contact {
  padding-top: 22px;
  border-top: 1px solid rgba(242, 227, 198, .18);
}

.page-faq .faq-contact__hint {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .16em;
  color: rgba(242, 227, 198, .55);
}

.page-faq .faq-contact__rows {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-final__panel .copy-btn {
  border: 1px solid rgba(242, 227, 198, .3);
  background: rgba(242, 227, 198, .07);
  color: var(--sand-2);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
}

.page-faq .faq-final__panel .copy-btn:hover {
  border-color: var(--gold);
  color: var(--gold);
}

/* ===== 平板 ===== */
@media (min-width: 700px) {
  .page-faq .faq-index .toc__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 56px);
  }

  .page-faq .cases {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: clamp(20px, 3vw, 40px);
  }

  .page-faq .case {
    border-top: 1px solid var(--faq-soft);
    border-bottom: none;
    padding: 22px 0 0;
  }

  .page-faq .case:last-child {
    border-bottom: none;
  }
}

/* ===== 桌面：不对称栅格 ===== */
@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    column-gap: clamp(32px, 5vw, 72px);
  }

  .page-faq .faq-hero__stamp,
  .page-faq .faq-hero h1,
  .page-faq .faq-hero__rule,
  .page-faq .faq-hero__lede {
    grid-column: 1 / -1;
  }

  .page-faq .faq-hero__lede {
    grid-column: 1 / 2;
  }

  .page-faq .faq-hero__anno {
    display: block;
    grid-column: 2 / 3;
    justify-self: end;
    margin: 0;
    color: var(--gold-deep);
  }

  .page-faq .zone {
    grid-template-columns: 168px minmax(0, 1fr);
    column-gap: clamp(28px, 4vw, 64px);
    row-gap: 26px;
    align-items: start;
  }

  .page-faq .zone__label {
    grid-column: 1;
    grid-row: 1;
  }

  .page-faq .zone__main {
    grid-column: 2;
    grid-row: 1;
  }

  .page-faq .zone--offset {
    margin-left: clamp(0px, 6vw, 96px);
  }

  .page-faq .steps {
    counter-reset: none;
  }

  .page-faq .step {
    grid-template-columns: 72px minmax(0, 1fr);
    column-gap: 24px;
  }
}

/* ===== 动效克制 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0ms !important;
    animation-duration: 0ms !important;
  }
}