.page-faq {
  --faq-answer-w: 40rem;
  --faq-hair: rgba(36, 31, 27, 0.14);
  background-color: var(--ink-900);
  color: var(--cream);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  background-color: var(--ink-900);
  background-image: var(--blueprint);
  border-bottom: var(--hairline);
}

.page-faq .faq-hero__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(26px, 5vw, 56px) var(--gutter) clamp(32px, 6vw, 64px);
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--green);
  text-decoration: underline;
}

.page-faq .breadcrumb__sep {
  color: var(--ink-500);
}

.page-faq .breadcrumb__item--current {
  color: var(--cream);
}

.page-faq .faq-kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--green);
}

.page-faq .display-title {
  margin: 0 0 18px;
  color: var(--cream);
}

.page-faq .lead {
  max-width: 36rem;
  margin: 0;
  color: var(--mist);
  line-height: 1.85;
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
}

.page-faq .faq-hero__stats li {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-faq .faq-stat__num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: -0.02em;
}

.page-faq .faq-stat__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-faq .faq-hero__art {
  margin: 0;
  border: var(--hairline);
  background-color: var(--ink-700);
}

.page-faq .faq-hero__art img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
}

/* ---------- 主体栅格 ---------- */
.page-faq .faq-body {
  background-color: var(--ink-900);
}

.page-faq .faq-body__grid {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(30px, 5vw, 56px) var(--gutter) clamp(48px, 7vw, 88px);
  display: grid;
  gap: clamp(22px, 3vw, 40px);
}

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

/* ---------- 移动端横向索引条 ---------- */
.page-faq .faq-rail {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

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

.page-faq .faq-rail .rail-link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid var(--ink-500);
  background-color: rgba(20, 41, 61, 0.62);
  color: var(--cream);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--ease), color var(--ease), background-color var(--ease);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-faq .faq-rail .rail-link[data-active="true"] {
  border-color: var(--green);
  background-color: rgba(110, 242, 138, 0.08);
  color: var(--green);
}

.page-faq .faq-rail .rail-link[data-active="true"] .faq-rail__num {
  color: var(--green);
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-group {
  margin-bottom: clamp(20px, 3vw, 32px);
  padding: clamp(18px, 3vw, 32px);
  background-color: var(--cream);
  color: var(--ink-text);
  border: 1px solid var(--ink-500);
  border-left-width: 4px;
  scroll-margin-top: 96px;
}

.page-faq .faq-group--green { border-left-color: var(--green); }
.page-faq .faq-group--orange { border-left-color: var(--orange); }
.page-faq .faq-group--amber { border-left-color: var(--amber); }
.page-faq .faq-group--mist { border-left-color: var(--mist); }

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-group__num {
  grid-row: 1 / span 2;
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(22px, 5vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink-500);
  letter-spacing: -0.03em;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.6vw, 1.55rem);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-faq .faq-group__desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(36, 31, 27, 0.62);
}

/* ---------- 手风琴 ---------- */
.page-faq .accordion {
  margin: 0;
}

.page-faq .accordion__item {
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .accordion__heading {
  margin: 0;
  font-size: 1rem;
  font-weight: 400;
}

.page-faq .accordion__trigger {
  width: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding: 16px 8px 16px 14px;
  background: none;
  border: 0;
  text-align: left;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.65;
  color: var(--ink-text);
  cursor: pointer;
  box-shadow: inset 3px 0 0 transparent;
  transition: box-shadow var(--ease), color var(--ease);
}

.page-faq .accordion__trigger:hover,
.page-faq .accordion__trigger:focus-visible {
  color: var(--orange-ink);
}

.page-faq .accordion__item[data-open="true"] .accordion__trigger {
  box-shadow: inset 3px 0 0 var(--green);
  color: var(--ink-900);
}

.page-faq .accordion__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-500);
}

.page-faq .accordion__item[data-open="true"] .accordion__index {
  color: var(--orange-ink);
}

.page-faq .accordion__mark::before {
  content: "+";
}

.page-faq .accordion__item[data-open="true"] .accordion__mark::before {
  content: "–";
}

.page-faq .accordion__mark {
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--ink-500);
}

.page-faq .accordion__item[data-open="true"] .accordion__mark {
  color: var(--orange-ink);
}

.page-faq .accordion__panel {
  display: block;
  max-width: var(--faq-answer-w);
  padding: 0 clamp(8px, 2vw, 14px) 18px clamp(26px, 6vw, 44px);
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(36, 31, 27, 0.78);
}

.page-faq .accordion__item[data-open="false"] > .accordion__panel {
  display: none;
}

.page-faq .accordion__panel p {
  margin: 0 0 10px;
}

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

.page-faq .accordion__panel a {
  color: var(--orange-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 三层规则说明 ---------- */
.page-faq .faq-rules {
  margin-bottom: clamp(20px, 3vw, 32px);
  padding: clamp(18px, 3vw, 32px);
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  background-color: var(--ink-700);
  border: 1px solid var(--ink-500);
  border-left: 4px solid var(--orange);
  scroll-margin-top: 96px;
}

.page-faq .faq-rules h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-faq .faq-rules p {
  margin: 0 0 12px;
  line-height: 1.85;
  color: var(--mist);
}

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

.page-faq .faq-rules__svg {
  display: block;
  width: 100%;
  max-width: 380px;
  height: auto;
  margin: 20px 0 0;
}

.page-faq .faq-rules__svg text {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  fill: var(--cream);
}

.page-faq .faq-rules__svg .faq-layer {
  stroke-width: 1;
}

.page-faq .faq-rules__svg .faq-layer--1 {
  fill: rgba(110, 242, 138, 0.14);
  stroke: #6EF28A;
}

.page-faq .faq-rules__svg .faq-layer--2 {
  fill: rgba(255, 138, 52, 0.14);
  stroke: #FF8A34;
}

.page-faq .faq-rules__svg .faq-layer--3 {
  fill: rgba(255, 200, 92, 0.14);
  stroke: #FFC85C;
}

.page-faq .faq-rules__svg .faq-axis {
  stroke: #1E3E59;
  stroke-width: 1;
}

.page-faq .faq-rules__figure {
  margin: 0;
  border: 1px solid var(--ink-500);
  background-color: var(--ink-900);
}

.page-faq .faq-rules__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 4;
  object-fit: cover;
}

/* ---------- 联系收尾 ---------- */
.page-faq .faq-contact {
  margin-top: clamp(12px, 2vw, 20px);
  padding: clamp(18px, 3vw, 32px);
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  background-color: var(--ink-700);
  border: 1px solid var(--ink-500);
  border-left: 4px solid var(--green);
  scroll-margin-top: 96px;
}

.page-faq .faq-contact h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  font-weight: 500;
  color: var(--cream);
}

.page-faq .faq-contact p {
  margin: 0;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.page-faq .faq-contact__box {
  display: grid;
  gap: 8px;
  justify-items: start;
  padding: 18px;
  background-color: rgba(11, 27, 43, 0.55);
  border: 1px dashed var(--ink-500);
}

.page-faq .faq-contact__box .contact-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .faq-contact__box .contact-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--cream);
  word-break: break-all;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: center;
  }

  .page-faq .faq-rules {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-faq .faq-body__grid {
    grid-template-columns: 200px minmax(0, 1fr);
  }

  .page-faq .faq-rail {
    display: block;
    overflow: visible;
    position: sticky;
    top: 96px;
    align-self: start;
    padding: 0 0 0 14px;
    border-left: 1px solid var(--ink-500);
  }

  .page-faq .faq-rail__title {
    display: block;
    margin: 0 0 14px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.18em;
    color: var(--mist);
  }

  .page-faq .faq-rail .rail-link {
    display: flex;
    width: 100%;
    margin-bottom: 4px;
    padding: 9px 0 9px 12px;
    border: 0;
    border-left: 2px solid transparent;
    background: none;
  }

  .page-faq .faq-rail .rail-link:hover,
  .page-faq .faq-rail .rail-link:focus-visible {
    border-left-color: var(--ink-500);
    color: var(--cream);
  }

  .page-faq .faq-rail .rail-link[data-active="true"] {
    border-left-color: var(--green);
    background: none;
    color: var(--green);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .accordion__trigger,
  .page-faq .faq-rail .rail-link {
    transition: none;
  }
}