.page-faq {
  --faq-line: rgba(44, 60, 110, 0.75);
  --faq-glow: rgba(182, 255, 59, 0.3);
  display: block;
  padding-bottom: clamp(3rem, 8vw, 6.5rem);
  scroll-margin-top: 6rem;
}

.page-faq .crumbs {
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
  font-size: 0.82rem;
}

.page-faq .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .crumbs a {
  color: var(--mist);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

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

.page-faq .crumbs li + li::before {
  content: "/";
  color: var(--line-cold);
  margin-inline-end: 0.5rem;
}

.page-faq .crumbs [aria-current="page"] {
  color: var(--cold-white);
}

/* ---------- 首屏 ---------- */

.page-faq__intro {
  margin-top: clamp(1.5rem, 4vw, 3rem);
}

.page-faq__intro-inner {
  display: grid;
  gap: 1.05rem;
  max-width: 62rem;
}

.page-faq__intro-inner::before {
  content: "";
  display: block;
  width: 3.25rem;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--neon), rgba(53, 224, 200, 0));
  margin-bottom: 0.2rem;
}

.page-faq__eyebrow {
  font-family: var(--font-num);
  font-size: 0.76rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--neon);
  margin: 0;
}

.page-faq__title {
  font-family: var(--font-head);
  font-size: clamp(2.1rem, 6.4vw, 3.85rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.015em;
  color: var(--cold-white);
  margin: 0;
  max-width: 20ch;
}

.page-faq__lead {
  font-size: clamp(1rem, 1.6vw, 1.08rem);
  line-height: 1.8;
  color: var(--mist);
  margin: 0;
  max-width: 58ch;
}

.page-faq__meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 0.35rem 0 0;
  padding: 0;
}

.page-faq__meta li {
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--mist);
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--stroke-soft);
  background: var(--surface-1);
  max-width: 100%;
}

/* ---------- 两栏布局 ---------- */

.page-faq__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 5vw, 2.5rem);
  margin-top: clamp(2.25rem, 6vw, 3.75rem);
  align-items: start;
}

.page-faq__rail {
  display: grid;
  gap: 0.85rem;
  min-width: 0;
}

.page-faq__rail-title {
  font-family: var(--font-num);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
  margin: 0;
}

.page-faq__nav {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-faq__nav::-webkit-scrollbar {
  display: none;
}

.page-faq__nav a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  flex: 0 0 auto;
  padding: 0.5rem 0.95rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--stroke-soft);
  background: var(--surface-1);
  color: var(--mist);
  font-size: 0.9rem;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease),
    border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-faq__nav a:hover,
.page-faq__nav a:focus-visible {
  color: var(--cold-white);
  border-color: var(--faq-line);
  background: var(--surface-2);
  transform: translateY(-2px);
}

.page-faq__nav-num {
  font-family: var(--font-num);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--neon);
}

.page-faq__rail-note {
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--mist);
  margin: 0;
}

.page-faq__rail-note a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-glow);
}

.page-faq__rail-note a:hover,
.page-faq__rail-note a:focus-visible {
  color: var(--cold-white);
  border-bottom-color: var(--cold-white);
}

.page-faq__sections {
  display: flex;
  flex-direction: column;
  gap: clamp(2.75rem, 7vw, 5rem);
  min-width: 0;
}

.page-faq__scene {
  min-width: 0;
  scroll-margin-top: 7rem;
}

.page-faq__scene-head {
  display: grid;
  gap: 0.55rem;
  padding-bottom: 1.15rem;
  border-bottom: 1px solid var(--faq-line);
  margin-bottom: 1.35rem;
}

.page-faq__scene-index {
  font-family: var(--font-num);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--neon);
  margin: 0;
}

.page-faq__scene-head h2 {
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 3.4vw, 2.05rem);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--cold-white);
  margin: 0;
}

.page-faq__scene-lede {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--mist);
  margin: 0;
  max-width: 62ch;
}

/* ---------- 条目列表 ---------- */

.page-faq__item {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq__item summary {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 0.25rem 1rem 1.05rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: clamp(1.03rem, 1.7vw, 1.16rem);
  font-weight: 600;
  line-height: 1.45;
  color: var(--cold-white);
  transition: color 0.2s var(--ease);
}

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

.page-faq__item summary::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  top: 0.9rem;
  bottom: 0.9rem;
  width: 3px;
  border-radius: 3px;
  background: var(--neon);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.3s var(--ease-out);
}

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

.page-faq__item summary::after {
  content: "+";
  margin-inline-start: auto;
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--mist);
  padding-top: 0.15rem;
  transition: color 0.2s var(--ease);
}

.page-faq__item[open] summary::after {
  content: "−";
  color: var(--neon);
}

.page-faq__item summary:hover {
  color: var(--neon);
}

.page-faq__item summary:hover::after {
  color: var(--neon);
}

.page-faq__item summary:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.page-faq__answer {
  display: grid;
  gap: 0.9rem;
  padding: 0 0 1.35rem 1.05rem;
  max-width: 68ch;
  font-size: 0.98rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq__answer p {
  margin: 0;
}

.page-faq__answer a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-glow);
}

.page-faq__answer a:hover,
.page-faq__answer a:focus-visible {
  color: var(--cold-white);
  border-bottom-color: var(--cold-white);
}

.page-faq__steps {
  list-style: none;
  display: grid;
  gap: 0.7rem;
  margin: 0;
  padding: 0;
}

.page-faq__steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.85rem;
  align-items: start;
}

.page-faq__step-num {
  font-family: var(--font-num);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  line-height: 1.5;
  min-width: 2.3rem;
  text-align: center;
  color: var(--neon);
  background: rgba(182, 255, 59, 0.08);
  border: 1px solid rgba(182, 255, 59, 0.3);
  border-radius: var(--radius-sm);
  padding: 0.18rem 0.4rem;
  white-space: nowrap;
}

/* ---------- 图文并排 ---------- */

.page-faq__scene-split {
  display: grid;
  gap: 1.5rem;
  min-width: 0;
}

.page-faq__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--stroke-soft);
  background: var(--surface-1);
}

.page-faq__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq__figure figcaption {
  padding: 0.75rem 1.05rem;
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--mist);
  border-top: 1px solid var(--stroke-soft);
}

.page-faq__figure--flow {
  margin-bottom: clamp(1.5rem, 4vw, 2.25rem);
}

/* ---------- 支持区 ---------- */

.page-faq__support {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.25rem);
}

.page-faq__contact {
  display: grid;
  border-top: 1px solid var(--faq-line);
}

.page-faq__contact-row {
  display: grid;
  gap: 0.25rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq__contact-key {
  font-family: var(--font-num);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq__contact-val {
  font-size: 1rem;
  line-height: 1.65;
  color: var(--cold-white);
  word-break: break-word;
}

.page-faq__contact-val a {
  color: var(--cold-white);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-glow);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

.page-faq__checklist {
  display: grid;
  gap: 0.9rem;
  align-content: start;
  padding: clamp(1.25rem, 3vw, 1.85rem);
  border-radius: var(--radius-lg);
  border: 1px solid var(--stroke-soft);
  background: linear-gradient(150deg, rgba(22, 36, 79, 0.85), rgba(11, 20, 48, 0.6));
}

.page-faq__checklist-title {
  font-family: var(--font-head);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--cold-white);
  margin: 0;
}

.page-faq__checklist ul {
  list-style: none;
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
}

.page-faq__checklist li {
  position: relative;
  padding-left: 1.4rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq__checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62rem;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--neon);
}

.page-faq__checklist-note {
  margin: 0;
  padding-top: 0.9rem;
  border-top: 1px solid var(--stroke-soft);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq__checklist-note a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-glow);
}

.page-faq__checklist-note a:hover,
.page-faq__checklist-note a:focus-visible {
  color: var(--cold-white);
  border-bottom-color: var(--cold-white);
}

/* ---------- 延伸入口 ---------- */

.page-faq__next {
  display: grid;
  gap: 1rem;
  margin-top: clamp(2.75rem, 7vw, 4.5rem);
}

.page-faq__next-title {
  font-family: var(--font-num);
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
  margin: 0;
}

.page-faq__next-links {
  display: grid;
  gap: 0.75rem;
}

.page-faq__next-link {
  display: grid;
  gap: 0.35rem;
  padding: 1.05rem 1.2rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--stroke-soft);
  background: var(--surface-1);
  text-decoration: none;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease),
    background-color 0.25s var(--ease);
}

.page-faq__next-link:hover,
.page-faq__next-link:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(182, 255, 59, 0.45);
  background: var(--surface-2);
}

.page-faq__next-label {
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--cold-white);
}

.page-faq__next-desc {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--mist);
}

.page-faq__totop {
  display: flex;
  justify-content: center;
  margin: clamp(2.5rem, 6vw, 3.5rem) 0 0;
}

/* ---------- 响应式 ---------- */

@media (min-width: 520px) {
  .page-faq__contact-row {
    grid-template-columns: 7.5rem minmax(0, 1fr);
    align-items: baseline;
    gap: 1rem;
  }
}

@media (min-width: 760px) {
  .page-faq__next-links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
  }
}

@media (min-width: 820px) {
  .page-faq__support {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq__layout {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: clamp(2rem, 4.5vw, 3.75rem);
  }

  .page-faq__rail {
    position: sticky;
    top: 6.5rem;
    gap: 1rem;
  }

  .page-faq__nav {
    flex-direction: column;
    gap: 0.3rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq__nav a {
    border-radius: var(--radius-md);
    border-color: transparent;
    background: transparent;
    padding: 0.6rem 0.85rem;
    white-space: normal;
  }

  .page-faq__nav a:hover,
  .page-faq__nav a:focus-visible {
    border-color: var(--stroke-soft);
    background: var(--surface-1);
    transform: translateX(3px);
  }
}

@media (min-width: 1100px) {
  .page-faq__scene-split {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(1.75rem, 3.5vw, 3rem);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}