.page-faq {
  --faq-gap: clamp(1.75rem, 5vw, 3rem);
  --faq-cut: 14px;
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: clamp(1rem, 3vw, 1.75rem) 0 0;
  font-size: 0.84rem;
  color: var(--muted);
}

.page-faq .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin: 0 0.5rem;
  color: rgba(199, 208, 218, 0.4);
}

.page-faq .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease-out), border-color 0.25s var(--ease-out);
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(1.4rem, 5vw, 2.6rem) 0 clamp(2rem, 6vw, 3.4rem);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -34%;
  right: -14%;
  width: min(680px, 80vw);
  height: 380px;
  background:
    radial-gradient(58% 58% at 68% 32%, rgba(34, 240, 200, 0.17), transparent 70%),
    radial-gradient(52% 52% at 28% 62%, rgba(255, 74, 28, 0.14), transparent 72%);
  pointer-events: none;
}

.page-faq .faq-hero__title {
  margin: 0.7rem 0 0;
  font-size: clamp(1.8rem, 5.4vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--white);
}

.page-faq .faq-hero__lede {
  max-width: 60ch;
  margin-top: 1.1rem;
  color: var(--muted);
}

.page-faq .faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.6rem;
}

.page-faq .faq-hero__meter {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1.25rem, 5vw, 3rem);
  margin: clamp(1.75rem, 5vw, 2.6rem) 0 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.page-faq .faq-hero__meter dt {
  margin: 0;
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-faq .faq-hero__meter dd {
  margin: 0.4rem 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  font-size: clamp(1.15rem, 3vw, 1.5rem);
  line-height: 1;
  color: var(--neon);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-index {
  border-top: 2px solid var(--line-strong);
  padding-top: 1rem;
}

.page-faq .faq-index__title {
  margin: 0 0 0.8rem;
  font-family: var(--font-serif);
  font-size: 1rem;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-faq .faq-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__list a {
  display: block;
  padding: 0.42rem 0.78rem;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  font-size: 0.86rem;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.25s var(--ease-out), border-color 0.25s var(--ease-out), background 0.25s var(--ease-out);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--white);
  border-color: var(--neon);
  background: rgba(34, 240, 200, 0.08);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 108px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(2.25rem, 6vw, 3.5rem);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin-bottom: 1.1rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  color: var(--brand);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 3.4vw, 1.75rem);
  line-height: 1.25;
  color: var(--white);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list > .faq-item {
  margin-bottom: 0.7rem;
}

.page-faq .faq-list > .faq-item:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item {
  position: relative;
  background: var(--panel-glass);
  border: 1px solid var(--line);
  clip-path: polygon(
    0 0,
    calc(100% - var(--faq-cut)) 0,
    100% var(--faq-cut),
    100% 100%,
    var(--faq-cut) 100%,
    0 calc(100% - var(--faq-cut))
  );
  transition: border-color 0.28s var(--ease-out), background 0.28s var(--ease-out);
}

.page-faq .faq-item:hover {
  border-color: var(--line-strong);
}

.page-faq .faq-item[open] {
  background: var(--panel);
}

.page-faq .faq-item__head {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 1.15rem 1rem 1.3rem;
  font-size: 1.02rem;
  font-weight: 500;
  line-height: 1.5;
  color: var(--white);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--brand), var(--neon));
  transition: width 0.28s var(--ease-out);
}

.page-faq .faq-item__head:hover::before,
.page-faq .faq-item[open] .faq-item__head::before {
  width: 7px;
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
}

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-top: 0.15rem;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  transition: border-color 0.28s var(--ease-out), transform 0.3s var(--ease-out);
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--muted);
}

.page-faq .faq-item__mark::before {
  width: 10px;
  height: 1.5px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__mark::after {
  width: 1.5px;
  height: 10px;
  transform: translate(-50%, -50%);
  transition: opacity 0.28s var(--ease-out);
}

.page-faq .faq-item[open] .faq-item__mark {
  transform: rotate(180deg);
  border-color: var(--neon);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  opacity: 0;
}

.page-faq .faq-item__body {
  padding: 0 1.25rem 1.15rem 1.3rem;
  font-size: 0.96rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-item__body p {
  margin: 0 0 0.6rem;
}

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

.page-faq .faq-item__body strong {
  color: var(--white);
  font-weight: 600;
}

.page-faq .faq-item__body a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 240, 200, 0.34);
}

.page-faq .faq-item__body a:hover,
.page-faq .faq-item__body a:focus-visible {
  border-bottom-color: var(--neon);
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 1.35rem;
  background: var(--panel);
  border: 1px solid var(--line);
  overflow: hidden;
  clip-path: polygon(
    0 0,
    calc(100% - 20px) 0,
    100% 20px,
    100% 100%,
    20px 100%,
    0 calc(100% - 20px)
  );
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

.page-faq .faq-figure__caption {
  padding: 0.7rem 1rem 0.85rem;
  border-top: 1px solid var(--line);
  font-size: 0.81rem;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 联系面板 ---------- */
.page-faq .faq-help {
  margin-top: clamp(2.5rem, 7vw, 4rem);
  padding: clamp(1.5rem, 4.5vw, 2.5rem);
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--brand);
  clip-path: polygon(
    0 0,
    calc(100% - 26px) 0,
    100% 26px,
    100% 100%,
    26px 100%,
    0 calc(100% - 26px)
  );
}

.page-faq .faq-help .headline {
  margin: 0.55rem 0 0;
  font-family: var(--font-serif);
  font-size: clamp(1.35rem, 3.6vw, 1.9rem);
  line-height: 1.25;
  color: var(--white);
}

.page-faq .faq-help .prose {
  max-width: 62ch;
  margin-top: 0.9rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-help .prose a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 240, 200, 0.34);
}

.page-faq .faq-help .prose a:hover,
.page-faq .faq-help .prose a:focus-visible {
  border-bottom-color: var(--neon);
}

.page-faq .faq-help__list {
  display: grid;
  gap: 0.55rem;
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-help__list .contact-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.9rem;
  padding: 0.7rem 0.9rem;
  background: rgba(11, 27, 46, 0.55);
  border-left: 2px solid var(--line);
}

.page-faq .faq-help__list .contact-item__label {
  flex: 0 0 auto;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-faq .faq-help__list .contact-item__value {
  flex: 1 1 auto;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.95rem;
  color: var(--white);
  word-break: break-word;
}

.page-faq .faq-help__list .copy-btn {
  flex: 0 0 auto;
  padding: 0.3rem 0.7rem;
  font-size: 0.78rem;
  color: var(--neon);
  background: transparent;
  border: 1px solid rgba(34, 240, 200, 0.4);
  border-radius: var(--pill);
  cursor: pointer;
  transition: background 0.25s var(--ease-out), color 0.25s var(--ease-out);
}

.page-faq .faq-help__list .copy-btn:hover,
.page-faq .faq-help__list .copy-btn:focus-visible {
  background: rgba(34, 240, 200, 0.14);
  color: var(--white);
}

.page-faq .faq-help__cta {
  margin-top: 1.4rem;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-list > .faq-item:nth-child(odd) {
    margin-left: 20px;
  }

  .page-faq .faq-item__head {
    font-size: 1.06rem;
    padding: 1.1rem 1.35rem 1.1rem 1.5rem;
  }

  .page-faq .faq-item__body {
    padding: 0 1.45rem 1.3rem 1.5rem;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 108px;
    align-self: start;
    border-top-width: 2px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-faq .faq-index__list a {
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0;
    padding: 0.55rem 0.85rem;
    font-size: 0.9rem;
  }

  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible {
    border-left-color: var(--neon);
    background: rgba(34, 240, 200, 0.07);
  }

  .page-faq .faq-help__list .contact-item {
    padding: 0.8rem 1.1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }

  .page-faq .faq-item[open] .faq-item__mark {
    transform: none;
  }
}