.page-faq {
  --faq-rail-w: 268px;
  padding-block: clamp(20px, 3vw, 36px) clamp(56px, 8vw, 110px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(20px, 3.4vw, 44px);
  align-items: center;
  padding: clamp(20px, 3.6vw, 48px);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(120% 140% at 8% 0%, rgba(59, 240, 220, .14), transparent 58%),
    radial-gradient(90% 120% at 100% 100%, rgba(138, 107, 255, .18), transparent 62%),
    var(--panel);
}

.page-faq .faq-hero-copy {
  min-width: 0;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 6vw, 58px);
  font-weight: 300;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero .lead {
  margin: 16px 0 0;
  max-width: 36ch;
  font-size: var(--fs-300);
  line-height: 1.9;
  color: var(--mist);
}

.page-faq .faq-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero-media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--stroke);
  background: linear-gradient(150deg, rgba(59, 240, 220, .1), rgba(138, 107, 255, .12) 60%, rgba(5, 11, 27, .9));
}

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

/* ---------- 主体骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(22px, 3.4vw, 44px);
  margin-top: clamp(30px, 5vw, 64px);
}

/* ---------- 目录 ---------- */
.page-faq .faq-rail {
  padding: 18px;
  border: 1px solid var(--stroke);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(10, 20, 48, .92), rgba(5, 11, 27, .92));
}

.page-faq .faq-rail-title {
  margin: 0 0 12px;
  font-size: var(--fs-100);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-rail-list {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-rail-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--fs-200);
  color: var(--paper);
  text-decoration: none;
  transition: background var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}

.page-faq .faq-rail-list a .mono {
  font-size: var(--fs-100);
  letter-spacing: .12em;
  color: var(--mist);
}

.page-faq .faq-rail-list a:hover {
  background: rgba(59, 240, 220, .12);
  transform: translateX(4px);
}

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

.page-faq .faq-rail-foot {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--stroke);
  font-size: var(--fs-100);
  line-height: 1.9;
  color: var(--mist);
}

/* ---------- 分组 ---------- */
.page-faq .faq-body {
  min-width: 0;
  display: grid;
  gap: clamp(34px, 5vw, 62px);
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .faq-group-head {
  display: grid;
  gap: 6px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--stroke);
}

.page-faq .faq-group-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 300;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-group-head p {
  margin: 0;
  max-width: 48ch;
  font-size: var(--fs-200);
  line-height: 1.9;
  color: var(--mist);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  border: 1px solid var(--stroke);
  border-radius: var(--radius-md);
  background: var(--panel);
  overflow: hidden;
  scroll-margin-top: calc(var(--header-h) + 24px);
  transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}

.page-faq .faq-item[open] {
  border-color: rgba(59, 240, 220, .45);
  background:
    linear-gradient(180deg, rgba(59, 240, 220, .07), rgba(10, 20, 48, 0) 46%),
    var(--panel);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-height: 44px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item summary::after {
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.2;
  color: var(--cyan);
}

.page-faq .faq-item[open] summary::after {
  content: "–";
}

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

.page-faq .faq-item summary:hover .faq-q {
  color: var(--cyan);
}

.page-faq .faq-index {
  flex: none;
  padding-top: 3px;
  font-size: var(--fs-100);
  letter-spacing: .12em;
  color: var(--mist);
}

.page-faq .faq-q {
  font-size: var(--fs-300);
  font-weight: 500;
  line-height: 1.6;
  color: var(--paper);
  transition: color var(--dur-fast) var(--ease);
}

.page-faq .faq-a {
  padding: 0 18px 18px 18px;
}

.page-faq .faq-a p {
  margin: 0;
  max-width: 62ch;
  font-size: var(--fs-200);
  line-height: 1.9;
  color: var(--mist);
}

.page-faq .faq-a p + p {
  margin-top: 10px;
}

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

.page-faq .faq-a .mono {
  color: var(--cyan);
}

.page-faq .faq-steps {
  display: grid;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .faq-steps li {
  display: flex;
  gap: 10px;
  font-size: var(--fs-200);
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-steps li::before {
  counter-increment: faqstep;
  content: counter(faqstep, decimal-leading-zero);
  flex: none;
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  color: var(--lime);
}

/* ---------- 客服区块 ---------- */
.page-faq .faq-support {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  padding: clamp(20px, 3.4vw, 34px);
  border-radius: var(--radius-xl);
  background: var(--paper);
  color: var(--ink);
}

.page-faq .faq-support-label {
  margin: 0;
  font-size: var(--fs-100);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(4, 18, 26, .6);
}

.page-faq .faq-support h3 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 300;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-support-text {
  margin: 12px 0 0;
  max-width: 48ch;
  font-size: var(--fs-200);
  line-height: 1.9;
  color: rgba(4, 18, 26, .78);
}

.page-faq .faq-support-list {
  display: grid;
  gap: 12px;
  margin: 20px 0 22px;
}

.page-faq .faq-support-list dt {
  font-size: var(--fs-100);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: rgba(4, 18, 26, .55);
}

.page-faq .faq-support-list dd {
  margin: 4px 0 0;
  font-size: var(--fs-300);
  font-weight: 500;
  color: var(--ink);
  word-break: break-word;
}

.page-faq .faq-support-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 24px;
  border-radius: var(--pill);
  background: var(--midnight);
  color: var(--paper);
  font-size: var(--fs-200);
  letter-spacing: .04em;
  text-decoration: none;
  width: fit-content;
  transition: background var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}

.page-faq .faq-support-link:hover {
  background: #0d1a3d;
  transform: translateY(-2px);
}

.page-faq .faq-support-link:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 3px;
}

.page-faq .faq-support-media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(4, 18, 26, .14);
  background: linear-gradient(160deg, rgba(59, 240, 220, .18), rgba(138, 107, 255, .18));
}

.page-faq .faq-support-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 1 / 1;
}

.page-faq .faq-support-more {
  margin: 18px 0 0;
  font-size: var(--fs-200);
  line-height: 1.9;
  color: var(--mist);
}

.page-faq .faq-support-more a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 窄屏 ---------- */
@media (max-width: 1023px) {
  .page-faq .faq-rail-list {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 6px;
    scrollbar-width: thin;
  }

  .page-faq .faq-rail-list a {
    white-space: nowrap;
    border: 1px solid var(--stroke);
  }

  .page-faq .faq-rail-foot {
    margin-top: 12px;
  }
}

@media (max-width: 560px) {
  .page-faq .faq-hero {
    padding: 18px;
    border-radius: var(--radius-lg);
  }

  .page-faq .faq-item summary {
    padding: 14px 14px;
    gap: 10px;
  }

  .page-faq .faq-a {
    padding: 0 14px 16px 14px;
  }

  .page-faq .faq-support {
    border-radius: var(--radius-lg);
  }
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-faq .faq-support {
    grid-template-columns: minmax(0, 1fr) minmax(0, .68fr);
    align-items: center;
  }

  .page-faq .faq-a {
    padding-left: 60px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail-list a,
  .page-faq .faq-item,
  .page-faq .faq-q,
  .page-faq .faq-support-link {
    transition: none;
  }

  .page-faq .faq-rail-list a:hover,
  .page-faq .faq-support-link:hover {
    transform: none;
  }
}