.page-faq {
  --faq-hair: rgba(107, 74, 27, .5);
  --faq-answer: rgba(244, 239, 230, .84);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(34px, 7vw, 86px) clamp(30px, 5vw, 62px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -22% -12% auto -12%;
  height: 130%;
  background:
    radial-gradient(62% 78% at 86% 4%, rgba(59, 227, 210, .10), transparent 68%),
    radial-gradient(54% 62% at 4% 96%, rgba(192, 138, 46, .14), transparent 70%);
  pointer-events: none;
}

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

.page-faq .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 30px);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
}

.page-faq .faq-hero .eyebrow {
  font-family: var(--font-mono);
  letter-spacing: .16em;
  color: var(--signal-gold);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 22px;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(30px, 5.4vw, 58px);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--paper-white);
  text-wrap: balance;
}

.page-faq .faq-hero .lede {
  max-width: 64ch;
  margin: 0;
  font-size: clamp(15px, 1.8vw, 18px);
  line-height: 1.85;
  color: var(--paper-white);
  opacity: .86;
}

.page-faq .hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--bright-gold);
}

.page-faq .hero-facts li {
  display: inline-flex;
  align-items: center;
  gap: 9px;
}

.page-faq .hero-facts li::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  border: 1px solid var(--signal-gold);
  transform: rotate(45deg);
}

/* ---------- 分组导览 ---------- */

.page-faq .faq-overview {
  padding-block: clamp(38px, 6vw, 78px);
}

.page-faq .faq-overview .section-head a {
  color: var(--neon-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .overview-split {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  margin-top: clamp(22px, 3vw, 36px);
}

.page-faq .overview-list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .overview-list li {
  margin: 0;
  padding: 0;
}

.page-faq .overview-list a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 15px 14px 15px 18px;
  border-left: 2px solid var(--line-bronze);
  color: inherit;
  text-decoration: none;
  transition: border-color var(--t-fast) var(--ease),
              background-color var(--t-fast) var(--ease);
}

.page-faq .overview-list a:hover {
  border-left-color: var(--neon-cyan);
  background: rgba(59, 227, 210, .05);
}

.page-faq .overview-list a:focus-visible {
  outline: 2px solid var(--neon-cyan);
  outline-offset: 2px;
  border-left-color: var(--neon-cyan);
}

.page-faq .ov-idx {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--signal-gold);
}

.page-faq .ov-name {
  display: block;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--paper-white);
}

.page-faq .ov-note {
  display: block;
  margin-top: 5px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist-green);
}

.page-faq .overview-split .figure {
  margin: 0;
}

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

/* ---------- 分组解答 ---------- */

.page-faq .faq-groups {
  background: linear-gradient(180deg,
    rgba(12, 42, 32, 0) 0%,
    rgba(12, 42, 32, .92) 6%,
    rgba(12, 42, 32, .92) 94%,
    rgba(12, 42, 32, 0) 100%);
}

.page-faq .faq-groups .canvas {
  padding-block: clamp(18px, 3vw, 40px);
}

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

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

.page-faq .group-head {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 20px);
  padding: clamp(22px, 3.4vw, 34px) 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .group-head:focus-visible {
  outline: 2px solid var(--neon-cyan);
  outline-offset: 4px;
}

.page-faq .group-idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--signal-gold);
}

.page-faq .group-name {
  font-family: var(--font-display);
  font-size: clamp(20px, 3.2vw, 30px);
  font-weight: 600;
  line-height: 1.2;
  color: var(--paper-white);
  text-wrap: balance;
}

.page-faq .group-rule {
  flex: 1 1 auto;
  min-width: 20px;
  height: 1px;
  background: linear-gradient(90deg, var(--signal-gold), rgba(192, 138, 46, 0));
  opacity: .7;
}

.page-faq .group-caret {
  flex: none;
  width: 9px;
  height: 9px;
  margin-left: 4px;
  border-right: 1.6px solid var(--bright-gold);
  border-bottom: 1.6px solid var(--bright-gold);
  transform: rotate(45deg);
  transition: transform var(--t-base) var(--ease),
              border-color var(--t-fast) var(--ease);
}

.page-faq .faq-group[open] > .group-head .group-caret {
  transform: rotate(-135deg);
  border-color: var(--neon-cyan);
}

.page-faq .group-body {
  padding-bottom: clamp(24px, 4vw, 56px);
}

.page-faq .group-split {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-faq .group-split .figure {
  margin: 0;
}

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

.page-faq .qa:first-child {
  border-top-color: transparent;
}

.page-faq .qa-q {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 17px 2px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.7vw, 17.5px);
  font-weight: 500;
  line-height: 1.62;
  color: var(--paper-white);
  transition: color var(--t-fast) var(--ease);
}

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

.page-faq .qa-q:hover .qa-text {
  color: var(--bright-gold);
}

.page-faq .qa-q:focus-visible {
  outline: 2px solid var(--neon-cyan);
  outline-offset: 2px;
}

.page-faq .qa-text {
  flex: 1 1 auto;
  text-wrap: balance;
  transition: color var(--t-fast) var(--ease);
}

.page-faq .qa-caret {
  position: relative;
  flex: none;
  width: 13px;
  height: 13px;
  margin-top: 6px;
}

.page-faq .qa-caret::before,
.page-faq .qa-caret::after {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 13px;
  height: 1.5px;
  background: var(--signal-gold);
  transition: transform var(--t-base) var(--ease),
              background-color var(--t-fast) var(--ease);
}

.page-faq .qa-caret::after {
  transform: rotate(90deg);
}

.page-faq .qa[open] > .qa-q .qa-caret::after {
  transform: rotate(0deg);
}

.page-faq .qa[open] > .qa-q .qa-caret::before {
  background: var(--neon-cyan);
}

.page-faq .qa-q:hover .qa-caret::before,
.page-faq .qa-q:hover .qa-caret::after {
  background: var(--neon-cyan);
}

.page-faq .qa-a {
  margin: 0 0 20px 2px;
  padding: 2px 0 4px 18px;
  border-left: 1px solid var(--line-bronze);
  transition: border-color var(--t-base) var(--ease);
}

.page-faq .qa[open] > .qa-a {
  border-left-color: var(--neon-cyan);
}

.page-faq .qa-a p {
  max-width: 62ch;
  margin: 0;
  font-size: clamp(14px, 1.6vw, 16px);
  line-height: 1.85;
  color: var(--faq-answer);
}

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

/* ---------- 人工协助 ---------- */

.page-faq .help-panel {
  padding: clamp(22px, 4vw, 46px);
  border: 1px solid var(--line-bronze);
  background:
    linear-gradient(135deg, rgba(15, 59, 58, .92), rgba(12, 42, 32, .72));
  clip-path: polygon(0 0,
    calc(100% - var(--cut)) 0,
    100% var(--cut),
    100% 100%,
    var(--cut) 100%,
    0 calc(100% - var(--cut)));
  transition: border-color var(--t-base) var(--ease);
}

.page-faq .help-panel:hover {
  border-color: var(--signal-gold);
}

.page-faq .help-lede {
  max-width: 58ch;
  margin: 0 0 20px;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--paper-white);
}

.page-faq .help-list {
  display: grid;
  gap: 10px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
}

.page-faq .help-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist-green);
}

.page-faq .help-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 1px;
  background: var(--signal-gold);
}

.page-faq .help-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-faq .overview-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, .88fr);
    align-items: start;
  }
}

@media (min-width: 940px) {
  .page-faq .group-split {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .group-split .figure {
    position: sticky;
    top: 28px;
  }

  .page-faq .qa-a {
    padding-left: 24px;
  }
}

@media (max-width: 560px) {
  .page-faq .faq-hero h1 {
    max-width: none;
  }

  .page-faq .hero-facts {
    gap: 8px 18px;
    font-size: 12px;
  }

  .page-faq .group-head {
    flex-wrap: wrap;
    gap: 10px 12px;
  }

  .page-faq .group-rule {
    order: 3;
    flex-basis: 100%;
  }

  .page-faq .group-caret {
    margin-left: auto;
  }

  .page-faq .qa-q {
    gap: 12px;
  }

  .page-faq .help-actions .btn {
    flex: 1 1 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 1ms !important;
  }
}