.page-faq {
  --faq-block: clamp(56px, 9vw, 112px);
  --faq-pad: clamp(18px, 3vw, 32px);
  padding-bottom: clamp(52px, 8vw, 96px);
}

.page-faq .breadcrumbs {
  margin-top: 20px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  display: grid;
  gap: 18px;
  padding: clamp(28px, 5vw, 56px) 0 clamp(28px, 4vw, 44px);
  border-bottom: 2px solid var(--line);
}

.page-faq .faq-hero__title {
  margin: 0;
  max-width: 24ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.85rem, 6.2vw, 3.8rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-hero__side {
  display: grid;
  gap: 18px;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(0.96rem, 1.6vw, 1.06rem);
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
}

.page-faq .faq-hero__facts li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-faq .faq-hero__facts li::before {
  content: "";
  width: 12px;
  height: 2px;
  background: var(--cyan);
}

/* ---------- 索引与图片 ---------- */

.page-faq .faq-index {
  padding-top: var(--faq-block);
}

.page-faq .faq-media {
  position: relative;
  display: block;
  margin: 24px 0 0;
  border: 2px solid var(--line);
  background: var(--panel-soft);
  overflow: hidden;
  aspect-ratio: 3 / 2;
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 四宫格 ---------- */

.page-faq .faq-quadrants {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  margin-top: 28px;
  border: 2px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-quad {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  position: relative;
  margin: 0;
  padding: 20px 22px;
  text-align: left;
  font: inherit;
  color: var(--text);
  background: var(--panel-soft);
  border: 0;
  border-bottom: 2px solid var(--line);
  border-left: 4px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), border-left-color 0.2s var(--ease);
}

.page-faq .faq-quad:last-child {
  border-bottom: 0;
}

.page-faq .faq-quad:hover {
  background: var(--panel);
}

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

.page-faq .faq-quad[aria-selected="true"] {
  background: var(--panel);
  border-left-color: var(--cyan);
}

.page-faq .faq-quad__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--muted);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-quad[aria-selected="true"] .faq-quad__no {
  color: var(--cyan);
}

.page-faq .faq-quad__body {
  display: grid;
  gap: 5px;
  min-width: 0;
}

.page-faq .faq-quad__name {
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.5;
}

.page-faq .faq-quad__desc {
  font-size: 0.85rem;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 问答面板 ---------- */

.page-faq .faq-panel {
  padding-top: clamp(28px, 4vw, 40px);
  animation: faq-panel-in 0.22s var(--ease) both;
}

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

@keyframes faq-panel-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.page-faq .faq-panel__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.22rem, 2.6vw, 1.62rem);
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-panel__title::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 12px;
  background: var(--cyan);
  vertical-align: middle;
}

.page-faq .faq-panel .faq-media {
  margin: 0 0 22px;
}

.page-faq .qa-list {
  border: 2px solid var(--line);
  background: var(--panel-soft);
}

.page-faq .qa {
  border-left: 4px solid transparent;
  border-bottom: 2px solid var(--line);
  transition: border-left-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .qa:last-child {
  border-bottom: 0;
}

.page-faq .qa[open] {
  border-left-color: var(--cyan);
  background: var(--panel);
}

.page-faq .qa__q {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 17px 56px 17px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 0.98rem;
  font-weight: 500;
  line-height: 1.7;
  color: var(--text);
  transition: color 0.2s var(--ease);
}

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

.page-faq .qa__q::marker {
  content: "";
}

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

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

.page-faq .qa__q::after {
  content: "+";
  position: absolute;
  top: 14px;
  right: 18px;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .qa[open] .qa__q::after {
  content: "−";
}

.page-faq .qa__alert {
  flex: none;
  width: 8px;
  height: 8px;
  margin-top: 9px;
  background: var(--signal);
  box-shadow: 0 0 0 3px rgba(255, 90, 54, 0.18);
}

.page-faq .qa__a {
  padding: 2px 22px 20px 18px;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--muted);
}

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

.page-faq .qa-steps {
  counter-reset: qastep;
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .qa-steps li {
  counter-increment: qastep;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  padding: 9px 0;
  border-top: 1px solid var(--line);
}

.page-faq .qa-steps li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .qa-steps li::before {
  content: counter(qastep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cyan);
  padding-top: 3px;
}

/* ---------- 联系区 ---------- */

.page-faq .faq-help {
  margin-top: var(--faq-block);
  padding: var(--faq-pad);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-help__text {
  margin: 14px 0 0;
  max-width: 66ch;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-help__rows {
  margin-top: 22px;
  border-top: 2px solid var(--line);
}

.page-faq .faq-help__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .footer-contact__key {
  flex: none;
  min-width: 74px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-faq .footer-contact__val {
  font-family: var(--font-mono);
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--text);
  word-break: break-all;
}

.page-faq .copy-btn {
  flex: none;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--cyan);
  background: transparent;
  border: 2px solid var(--cyan);
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-faq .copy-btn:hover {
  background: var(--cyan);
  color: var(--ink);
}

.page-faq .copy-btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 下一站 ---------- */

.page-faq .faq-next {
  margin-top: var(--faq-block);
  padding-top: 28px;
  border-top: 2px solid var(--line);
}

.page-faq .faq-next__list {
  display: grid;
  gap: 0;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-next__list li {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-next__list li::before {
  content: "";
  width: 10px;
  height: 10px;
  margin-top: 7px;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(43, 227, 198, 0.15);
}

.page-faq .faq-next__link {
  display: inline-block;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  border-bottom: 2px solid var(--cyan);
  padding-bottom: 1px;
}

.page-faq .faq-next__link:hover,
.page-faq .faq-next__link:focus-visible {
  color: var(--cyan);
}

.page-faq .faq-next__desc {
  display: block;
  margin-top: 5px;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-quadrants {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-quad {
    padding: 26px;
    border-right: 2px solid var(--line);
  }

  .page-faq .faq-quad:nth-child(2n) {
    border-right: 0;
  }

  .page-faq .faq-quad:nth-child(n + 3) {
    border-bottom: 0;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    column-gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-faq .faq-hero > .eyebrow {
    grid-column: 1 / -1;
  }

  .page-faq .faq-hero__title {
    grid-column: 1;
    max-width: 20ch;
  }

  .page-faq .faq-hero__side {
    grid-column: 2;
  }

  .page-faq .qa__q {
    font-size: 1.02rem;
    padding: 20px 64px 20px 22px;
  }

  .page-faq .qa__a {
    padding: 2px 64px 24px 22px;
    font-size: 0.96rem;
  }

  .page-faq .faq-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 56px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-panel {
    animation: none;
  }

  .page-faq .faq-quad,
  .page-faq .qa,
  .page-faq .qa__q,
  .page-faq .copy-btn {
    transition: none;
  }
}