.page-faq {
  --faq-pad: clamp(16px, 2vw, 22px);
  --faq-indent: clamp(54px, 7vw, 68px);
  --faq-ice-soft: rgba(111, 211, 255, 0.2);
  --faq-ice-faint: rgba(111, 211, 255, 0.1);
  display: block;
  padding-bottom: clamp(56px, 8vw, 100px);
}

.page-faq .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: clamp(24px, 4vw, 40px);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--cream-2);
}

.page-faq .breadcrumb-link {
  color: var(--purple-2);
  text-decoration: none;
  transition: color var(--speed) var(--ease);
}

.page-faq .breadcrumb-link:hover {
  color: var(--orange);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding-top: clamp(20px, 3vw, 34px);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: 7fr 5fr;
    gap: clamp(28px, 4vw, 60px);
    align-items: end;
  }
}

.page-faq .faq-hero .eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  color: var(--ice);
  margin: 0 0 14px;
}

.page-faq h1.display-1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.95rem, 4.6vw, 3.5rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 0;
  max-width: 22ch;
}

.page-faq .faq-hero-note .lede {
  margin: 0;
  font-family: var(--font-body);
  font-size: clamp(0.98rem, 1.4vw, 1.06rem);
  line-height: 1.8;
  color: var(--cream-2);
  max-width: 46ch;
  padding-left: clamp(0px, 2vw, 22px);
  border-left: 2px solid var(--purple);
}

.page-faq .faq-hero-media {
  margin: clamp(24px, 4vw, 44px) 0 0;
  border: 1px solid var(--faq-ice-soft);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--panel);
}

.page-faq .faq-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 2;
  object-fit: cover;
}

/* ---------- 分类标签 ---------- */

.page-faq .faq-nav {
  padding-top: clamp(30px, 5vw, 52px);
}

.page-faq .tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .tag-btn {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  padding: 9px 17px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--cream-2);
  background: var(--cream);
  color: var(--ink);
  cursor: pointer;
  transition: background var(--speed) var(--ease), border-color var(--speed) var(--ease),
    color var(--speed) var(--ease), transform var(--speed) var(--ease);
}

.page-faq .tag-btn:hover {
  border-color: var(--purple);
  transform: translateY(-1px);
}

.page-faq .tag-btn[aria-pressed="true"],
.page-faq .tag-btn.is-active {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink-deep);
}

/* ---------- 分类区块 ---------- */

.page-faq .faq-cats {
  padding-top: clamp(24px, 4vw, 40px);
}

.page-faq .faq-cat {
  padding: clamp(30px, 5vw, 56px) 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-cats > .faq-cat:first-child {
  border-top: 0;
  padding-top: clamp(24px, 4vw, 40px);
}

@media (min-width: 880px) {
  .page-faq .faq-cat {
    display: grid;
    grid-template-columns: minmax(180px, 3fr) 9fr;
    gap: clamp(28px, 4vw, 60px);
    align-items: start;
  }

  .page-faq .faq-cat-head {
    position: sticky;
    top: 104px;
  }

  .page-faq .faq-cat--media .faq-cat-head {
    position: static;
  }
}

.page-faq .faq-cat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 4.6vw, 3.4rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--purple);
}

.page-faq .faq-cat-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.3rem, 2.2vw, 1.8rem);
  letter-spacing: -0.01em;
  line-height: 1.15;
  color: var(--white);
  margin: 8px 0 10px;
}

.page-faq .faq-cat-note {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--cream-2);
  max-width: 24ch;
}

.page-faq .faq-aside-media {
  margin: 20px 0 0;
  border: 1px solid var(--faq-ice-soft);
  border-radius: 12px;
  overflow: hidden;
  background: var(--panel);
  max-width: 300px;
}

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

.page-faq .faq-aside-media .media-caption {
  margin: 0;
  padding: 10px 12px;
  border-top: 1px solid var(--faq-ice-soft);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--cream-2);
}

/* ---------- 手风琴 ---------- */

.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .faq-item {
  position: relative;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--faq-ice-soft);
  border-radius: 12px;
  transition: border-color var(--speed) var(--ease);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--orange), var(--purple));
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform var(--speed) var(--ease);
  pointer-events: none;
}

.page-faq .faq-item:hover {
  border-color: var(--purple-2);
}

.page-faq .faq-item[open] {
  border-color: var(--purple);
}

.page-faq .faq-item[open]::before {
  transform: scaleY(1);
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: start;
  padding: var(--faq-pad);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1rem, 1.5vw, 1.14rem);
  line-height: 1.5;
  letter-spacing: -0.005em;
  color: var(--white);
  transition: color var(--speed) var(--ease);
}

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

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

.page-faq .faq-q:hover {
  color: var(--orange-2);
}

.page-faq .faq-idx {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--ice);
  padding-top: 3px;
  transition: color var(--speed) var(--ease);
}

.page-faq .faq-item[open] .faq-idx {
  color: var(--orange);
}

.page-faq .faq-mark {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 4px;
  flex: none;
}

.page-faq .faq-mark::before,
.page-faq .faq-mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 14px;
  height: 1.5px;
  background: var(--purple-2);
  transform: translate(-50%, -50%);
  transition: transform var(--speed) var(--ease), background var(--speed) var(--ease);
}

.page-faq .faq-mark::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .faq-item[open] .faq-mark::before,
.page-faq .faq-item[open] .faq-mark::after {
  background: var(--orange);
}

.page-faq .faq-item[open] .faq-mark::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.page-faq .faq-a {
  padding: 0 var(--faq-pad) var(--faq-pad) var(--faq-indent);
  border-top: 1px solid var(--faq-ice-faint);
}

.page-faq .faq-a p {
  margin: 14px 0 0;
  max-width: 62ch;
  font-family: var(--font-body);
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--cream-2);
}

.page-faq .faq-a a {
  color: var(--ice);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--speed) var(--ease);
}

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

/* ---------- 兜底联系区 ---------- */

.page-faq .faq-fallback {
  margin-top: clamp(44px, 7vw, 88px);
}

.page-faq .faq-fallback-shell {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
  padding: clamp(24px, 3.5vw, 44px);
  border-radius: var(--radius-card);
  border: 1px solid var(--faq-ice-soft);
  background: rgba(22, 20, 31, 0.74);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

@media (min-width: 880px) {
  .page-faq .faq-fallback-shell {
    grid-template-columns: 7fr 5fr;
    align-items: center;
  }
}

.page-faq .faq-fallback-main .label-mono {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--ice);
  margin: 0 0 10px;
}

.page-faq .faq-fallback h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.45rem, 3vw, 2.15rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 0 0 12px;
}

.page-faq .faq-fallback-main p {
  margin: 0;
  max-width: 52ch;
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--cream-2);
}

.page-faq .faq-lines {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .faq-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(11, 10, 16, 0.62);
  font-size: 0.9rem;
}

.page-faq .faq-line .label-mono {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--purple-2);
}

.page-faq .faq-line-value {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.88rem;
  letter-spacing: 0.01em;
  color: var(--ice);
  overflow-wrap: anywhere;
}

.page-faq .copy-btn {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  padding: 6px 13px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--purple-2);
  background: transparent;
  color: var(--purple-2);
  cursor: pointer;
  transition: background var(--speed) var(--ease), color var(--speed) var(--ease),
    border-color var(--speed) var(--ease);
}

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

.page-faq .copy-hint {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--up);
}

.page-faq .copy-hint:empty {
  display: none;
}

/* ---------- 窄屏 ---------- */

@media (max-width: 640px) {
  .page-faq .faq-q {
    gap: 10px;
    font-size: 1rem;
  }

  .page-faq .faq-hero-note .lede {
    padding-left: 14px;
  }

  .page-faq .faq-aside-media {
    max-width: 100%;
  }

  .page-faq .faq-line {
    align-items: flex-start;
  }

  .page-faq .copy-btn {
    margin-left: 0;
  }
}

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