.page-faq {
  --faq-cut: 10px;
  --faq-gap: clamp(16px, 3vw, 28px);
  --faq-rule: rgba(159, 176, 184, 0.26);
  background: var(--c-ink);
  color: var(--c-mist);
  padding-bottom: clamp(48px, 8vw, 88px);
}

.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: clamp(14px, 2.4vw, 24px);
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  color: var(--c-graphite);
}

.page-faq .breadcrumb a {
  color: var(--c-graphite);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--c-teal);
  border-bottom-color: var(--c-teal);
}

.page-faq .breadcrumb span[aria-current] {
  color: var(--c-mist);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3.5vw, 40px) 0 clamp(28px, 4.5vw, 56px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -14%;
  width: clamp(260px, 46vw, 700px);
  aspect-ratio: 1;
  background: radial-gradient(closest-side, rgba(18, 191, 162, 0.22), transparent 72%);
  pointer-events: none;
}

.page-faq .faq-hero-grid {
  position: relative;
  display: grid;
  gap: var(--faq-gap);
  align-items: end;
}

.page-faq .faq-hero-copy .label {
  color: var(--c-teal);
  margin: 0;
}

.page-faq .faq-hero h1 {
  margin: 0.4em 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.page-faq .faq-hero .lead {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: rgba(243, 247, 246, 0.8);
}

.page-faq .faq-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
  color: var(--c-graphite);
}

.page-faq .faq-hero-meta .mono {
  color: var(--c-lime);
  font-size: var(--fs-sm);
  margin-right: 4px;
}

.page-faq .faq-hero-media {
  position: relative;
  margin: 0;
  background: var(--c-ink-2);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-faq .faq-hero-media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

/* ---------- 四块分类入口 ---------- */
.page-faq .faq-cats {
  padding-bottom: clamp(28px, 4vw, 48px);
}

.page-faq .faq-cat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-cat {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 128px;
  padding: 14px 14px 18px;
  text-decoration: none;
  color: var(--c-ink);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: transform var(--dur) var(--ease), filter var(--dur) var(--ease);
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible {
  transform: translateY(-3px);
  filter: brightness(1.07);
}

.page-faq .faq-cat:focus-visible {
  outline: 2px solid var(--c-mist);
  outline-offset: 2px;
}

.page-faq .faq-cat--teal { background: var(--c-teal); }
.page-faq .faq-cat--orange { background: var(--c-orange); }
.page-faq .faq-cat--lime { background: var(--c-lime); }
.page-faq .faq-cat--mist { background: var(--c-mist); }

.page-faq .faq-cat-no {
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  opacity: 0.6;
}

.page-faq .faq-cat-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(17px, 2.1vw, 21px);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-faq .faq-cat-desc {
  margin-top: auto;
  font-size: var(--fs-xs);
  line-height: 1.5;
  opacity: 0.76;
}

/* ---------- 目录 + 答案 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
  padding-top: clamp(16px, 2.4vw, 28px);
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-index {
  padding: 16px 14px 14px;
  background: var(--c-ink-2);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  max-height: 300px;
  overflow: auto;
}

.page-faq .faq-index-title {
  margin: 0 0 12px;
  color: var(--c-teal);
}

.page-faq .faq-index-list,
.page-faq .faq-index-sub {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index-group + .faq-index-group {
  margin-top: 14px;
}

.page-faq .faq-index-link--head {
  display: block;
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--faq-rule);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-sm);
  color: var(--c-mist);
  text-decoration: none;
}

.page-faq .faq-index-link--head:hover,
.page-faq .faq-index-link--head:focus-visible {
  color: var(--c-lime);
}

.page-faq .faq-index-sub li + li {
  margin-top: 2px;
}

.page-faq .faq-index-link {
  display: block;
  padding: 5px 0 5px 10px;
  border-left: 2px solid transparent;
  font-size: var(--fs-xs);
  line-height: 1.45;
  color: var(--c-graphite);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--c-mist);
  border-left-color: var(--c-teal);
}

.page-faq .faq-group {
  scroll-margin-top: 96px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 5vw, 54px);
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--c-teal);
}

.page-faq .faq-group-no {
  font-size: var(--fs-xs);
  letter-spacing: 0.16em;
  color: var(--c-lime);
}

.page-faq .faq-group-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 2.6vw, 28px);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-q {
  border-bottom: 1px solid var(--faq-rule);
  scroll-margin-top: 96px;
}

.page-faq .faq-q summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-body);
  line-height: 1.55;
  color: var(--c-mist);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-q summary:hover {
  color: var(--c-teal);
}

.page-faq .faq-q summary:focus-visible {
  outline: 2px solid var(--c-teal);
  outline-offset: 4px;
}

.page-faq .faq-q-no {
  flex: none;
  padding-top: 2px;
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  color: var(--c-graphite);
}

.page-faq .faq-q summary::after {
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-md);
  line-height: 1;
  color: var(--c-teal);
}

.page-faq .faq-q[open] summary::after {
  content: "−";
  color: var(--c-orange);
}

.page-faq .faq-a {
  padding: 0 0 18px;
  padding-inline-start: clamp(0px, 4vw, 34px);
  max-width: 62ch;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: rgba(243, 247, 246, 0.78);
}

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

.page-faq .faq-a a {
  color: var(--c-teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-a a:hover {
  color: var(--c-lime);
}

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

.page-faq .faq-q[open] .faq-a {
  animation: faq-open var(--dur) var(--ease);
}

/* ---------- 转人工 ---------- */
.page-faq .faq-contact {
  margin-top: clamp(36px, 6vw, 64px);
  scroll-margin-top: 96px;
}

.page-faq .faq-contact-inner {
  display: grid;
  gap: var(--faq-gap);
  padding: clamp(20px, 3.6vw, 36px);
  background: linear-gradient(135deg, var(--c-indigo), var(--c-wine));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-faq .faq-contact-copy .label {
  margin: 0;
  color: var(--c-lime);
}

.page-faq .faq-contact-copy h2 {
  margin: 0.5em 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.page-faq .faq-contact-copy > p {
  margin: 14px 0 0;
  max-width: 48ch;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: rgba(243, 247, 246, 0.84);
}

.page-faq .faq-contact-list {
  display: grid;
  gap: 9px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  font-size: var(--fs-sm);
  line-height: 1.6;
}

.page-faq .faq-contact-key {
  flex: none;
  min-width: 40px;
  color: var(--c-graphite);
  letter-spacing: 0.08em;
  font-size: var(--fs-xs);
  padding-top: 3px;
}

.page-faq .faq-contact-val {
  color: var(--c-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}

.page-faq a.faq-contact-val:hover,
.page-faq a.faq-contact-val:focus-visible {
  border-bottom-color: var(--c-lime);
}

.page-faq .faq-contact-note {
  margin: 16px 0 0;
  font-size: var(--fs-xs);
  line-height: 1.7;
  color: rgba(243, 247, 246, 0.7);
}

.page-faq .faq-contact-note a {
  color: var(--c-lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-contact-copy .btn {
  margin-top: 20px;
}

.page-faq .faq-contact-media {
  margin: 0;
  align-self: stretch;
  background: rgba(6, 24, 42, 0.4);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-faq .faq-contact-media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-cat-grid {
    gap: 14px;
  }

  .page-faq .faq-cat {
    min-height: 146px;
    padding: 18px 18px 22px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }

  .page-faq .faq-cat-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-body {
    grid-template-columns: 288px minmax(0, 1fr);
    gap: clamp(24px, 3vw, 44px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 88px;
    max-height: calc(100vh - 112px);
    overflow: auto;
  }

  .page-faq .faq-contact-inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
    gap: clamp(24px, 3.4vw, 44px);
  }
}

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

  .page-faq .faq-cat,
  .page-faq .faq-q summary,
  .page-faq .faq-index-link {
    transition: none;
  }

  .page-faq .faq-cat:hover,
  .page-faq .faq-cat:focus-visible {
    transform: none;
  }
}