.page-faq {
  overflow-x: clip;
  background:
    radial-gradient(circle at 8% 12%, rgba(139, 92, 246, 0.14), transparent 24rem),
    radial-gradient(circle at 92% 34%, rgba(0, 166, 255, 0.12), transparent 28rem),
    linear-gradient(180deg, #070B16, var(--hyty-bg) 50%, #0D1424);
  color: var(--hyty-white);
}

/* ---------- Hero 首屏封面 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(1.5rem, 4vw, 3rem) 0 2rem;
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "Q&A";
  position: absolute;
  right: -0.08em;
  top: 0.12em;
  z-index: 0;
  font-family: var(--hyty-font-display);
  font-weight: 900;
  font-size: clamp(4.5rem, 18vw, 14rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(240, 245, 255, 0.07);
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.75rem;
  font-family: var(--hyty-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--hyty-mist);
  text-transform: uppercase;
}

.page-faq .faq-breadcrumb a {
  color: var(--hyty-blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 166, 255, 0.4);
  transition: border-color 0.2s var(--hyty-ease);
}

.page-faq .faq-breadcrumb a:hover {
  border-color: var(--hyty-blue);
}

.page-faq .faq-hero-copy {
  max-width: 42rem;
}

.page-faq .faq-hero-copy h1 {
  margin: 0.75rem 0 1.25rem;
  font-family: var(--hyty-font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 5vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--hyty-white);
}

.page-faq .faq-h1-sub {
  display: inline-block;
  margin-top: 0.2rem;
  color: transparent;
  -webkit-text-stroke: 1px rgba(159, 176, 217, 0.9);
}

.page-faq .faq-hero-lead {
  max-width: 36rem;
  margin: 1.25rem 0 1.5rem;
  color: var(--hyty-mist);
  font-size: 1rem;
  line-height: 1.95;
}

.page-faq .faq-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.page-faq .faq-hero-aside {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin-top: 2rem;
  padding: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--hyty-radius-soft);
  background: rgba(20, 28, 46, 0.65);
  box-shadow: var(--hyty-shadow);
  max-width: 22rem;
}

.page-faq .faq-hero-aside-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.page-faq .faq-hero-aside-row:last-child {
  border-bottom: 0;
}

.page-faq .faq-hero-aside-label {
  font-family: var(--hyty-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--hyty-mist);
  text-transform: uppercase;
}

.page-faq .faq-hero-aside-row strong {
  font-family: var(--hyty-font-mono);
  font-size: 0.875rem;
  color: var(--hyty-lime);
  font-weight: 500;
  white-space: nowrap;
}

/* ---------- 左右分栏布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding-top: 1rem;
  padding-bottom: calc(var(--hyty-space-lg) + 2rem);
}

/* ---------- 左侧专题索引 ---------- */
.page-faq .faq-index-card {
  padding: 1.25rem;
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--hyty-radius);
  background:
    radial-gradient(circle at 100% 0%, rgba(139, 92, 246, 0.14), transparent 14rem),
    rgba(20, 28, 46, 0.8);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.25);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-faq .faq-index-list a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 0.75rem;
  border: 1px solid transparent;
  border-radius: var(--hyty-radius-soft);
  color: var(--hyty-mist);
  text-decoration: none;
  font-size: 0.9rem;
  transition: background 0.2s var(--hyty-ease), border-color 0.2s var(--hyty-ease), color 0.2s var(--hyty-ease);
}

.page-faq .faq-index-list a span {
  font-family: var(--hyty-font-mono);
  font-size: 0.72rem;
  color: var(--hyty-purple);
}

.page-faq .faq-index-list a:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.08);
  color: var(--hyty-white);
}

.page-faq .faq-index-list a.is-active {
  background: rgba(139, 92, 246, 0.16);
  border-color: rgba(139, 92, 246, 0.55);
  color: var(--hyty-white);
}

.page-faq .faq-index-list a.is-active span {
  color: var(--hyty-lime);
}

.page-faq .faq-index-note {
  margin: 1.25rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--hyty-mist);
  font-size: 0.8rem;
  line-height: 1.8;
}

/* ---------- 右侧手风琴主体 ---------- */
.page-faq .faq-main {
  display: grid;
  gap: 3rem;
}

/* ---------- 分类区块 ---------- */
.page-faq .faq-category {
  position: relative;
  padding: 1.75rem 1.1rem 1.75rem;
  border-radius: var(--hyty-radius);
  background: rgba(20, 28, 46, 0.38);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.page-faq .faq-category--cost {
  --faq-border: rgba(0, 166, 255, 0.26);
  --faq-accent: var(--hyty-blue);
}

.page-faq .faq-category--login {
  --faq-border: rgba(139, 92, 246, 0.32);
  --faq-accent: var(--hyty-purple);
}

.page-faq .faq-category--updates {
  --faq-border: rgba(182, 255, 0, 0.26);
  --faq-accent: var(--hyty-lime);
}

.page-faq .faq-category--devices {
  --faq-border: rgba(0, 166, 255, 0.24);
  --faq-accent: var(--hyty-blue);
}

.page-faq .faq-category--contact {
  --faq-border: rgba(139, 92, 246, 0.3);
  --faq-accent: var(--hyty-lime);
}

.page-faq .faq-category-head {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding-left: 0.85rem;
  border-left: 4px solid var(--faq-accent);
}

.page-faq .faq-category-head .hyty-eyelet {
  color: var(--faq-accent);
}

.page-faq .faq-category-head h2 {
  margin: 0;
  font-family: var(--hyty-font-display);
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--hyty-white);
}

.page-faq .faq-category-desc {
  margin: 1rem 0 1.35rem 0.85rem;
  color: var(--hyty-mist);
  font-size: 0.9rem;
  line-height: 1.8;
}

/* ---------- 折叠手风琴 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 0.75rem;
}

.page-faq .faq-item {
  position: relative;
  border: 1px solid var(--faq-border);
  border-radius: var(--hyty-radius-soft);
  background: linear-gradient(135deg, rgba(20, 28, 46, 0.92), rgba(30, 42, 64, 0.58));
  transition: border-color 0.25s var(--hyty-ease), box-shadow 0.25s var(--hyty-ease);
}

.page-faq .faq-item:hover {
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.22);
}

.page-faq .faq-anchor {
  position: absolute;
  top: 0.75rem;
  right: 3rem;
  z-index: 3;
  font-family: var(--hyty-font-mono);
  font-size: 0.8rem;
  color: var(--hyty-mist);
  text-decoration: none;
  opacity: 0;
  transition: opacity 0.2s var(--hyty-ease), color 0.2s var(--hyty-ease);
}

.page-faq .faq-item:hover .faq-anchor,
.page-faq .faq-item:focus-within .faq-anchor {
  opacity: 1;
}

.page-faq .faq-anchor:hover {
  color: var(--hyty-lime);
}

.page-faq .faq-toggle {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.page-faq .faq-q {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1rem 3.25rem 1rem 0.85rem;
  cursor: pointer;
  border-radius: var(--hyty-radius-soft);
  background: rgba(255, 255, 255, 0.02);
  transition: background 0.2s var(--hyty-ease);
}

.page-faq .faq-q:hover {
  background: rgba(255, 255, 255, 0.05);
}

.page-faq .faq-toggle:focus-visible + .faq-q {
  outline: 2px solid var(--hyty-lime);
  outline-offset: 2px;
}

.page-faq .faq-q-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  min-width: 2.45rem;
  height: 1.85rem;
  padding: 0 0.45rem;
  border-radius: 4px 2px 8px 2px;
  background: var(--hyty-lime);
  color: var(--hyty-bg);
  font-family: var(--hyty-font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  transform: skewX(-12deg);
  transition: background 0.25s var(--hyty-ease), color 0.25s var(--hyty-ease);
}

.page-faq .faq-q-num span {
  display: inline-block;
  transform: skewX(12deg);
}

.page-faq .faq-q-text {
  flex: 1;
  color: var(--hyty-white);
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.5;
}

.page-faq .faq-q-icon {
  flex: 0 0 1.75rem;
  width: 1.75rem;
  height: 1.75rem;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  color: var(--hyty-mist);
  font-size: 1rem;
  line-height: 1;
  transition: transform 0.25s var(--hyty-ease), border-color 0.25s var(--hyty-ease), color 0.25s var(--hyty-ease);
}

.page-faq .faq-toggle:checked + .faq-q .faq-q-num {
  background: var(--faq-accent);
  color: var(--hyty-white);
}

.page-faq .faq-toggle:checked + .faq-q .faq-q-icon {
  transform: rotate(45deg);
  border-color: var(--faq-accent);
  color: var(--faq-accent);
}

.page-faq .faq-a {
  display: none;
  padding: 0.1rem 1.1rem 1.2rem 3.85rem;
  color: var(--hyty-mist);
  font-size: 0.92rem;
  line-height: 1.9;
}

.page-faq .faq-toggle:checked ~ .faq-a {
  display: block;
  animation: faqAnswerIn 0.28s var(--hyty-ease);
}

.page-faq .faq-a p {
  margin: 0 0 0.75rem;
}

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

.page-faq .faq-note {
  margin-top: 1rem;
  padding: 0.7rem 0.9rem;
  border-left: 2px solid var(--faq-accent);
  background: rgba(255, 255, 255, 0.03);
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--hyty-mist);
}

/* ---------- 图片区 ---------- */
.page-faq .faq-figure {
  margin: 2rem 0 0 auto;
  max-width: min(100%, 520px);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--hyty-radius);
  border: 1px solid rgba(255, 255, 255, 0.1);
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 0.7rem;
  padding-left: 1rem;
  border-left: 3px solid var(--faq-accent);
  color: var(--hyty-mist);
  font-size: 0.78rem;
  line-height: 1.7;
}

.page-faq .faq-figure--cost {
  margin-right: -0.35rem;
}

.page-faq .faq-figure--sync {
  margin-top: 1.5rem;
  margin-left: auto;
  margin-right: 0.75rem;
  max-width: min(100%, 480px);
}

/* ---------- 联系面板 ---------- */
.page-faq .faq-contact-panel {
  position: relative;
  margin-top: 2rem;
  padding: 1.5rem;
  border-radius: var(--hyty-radius);
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(0, 166, 255, 0.08)), var(--hyty-bg-panel);
  border: 1px solid rgba(139, 92, 246, 0.3);
}

.page-faq .faq-contact-panel .hyty-eyelet {
  color: var(--hyty-purple);
}

.page-faq .faq-contact-panel-title {
  margin: 0.6rem 0 0.5rem;
  font-family: var(--hyty-font-display);
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--hyty-white);
}

.page-faq .faq-contact-panel > p:not(.faq-contact-panel-title):not(.hyty-eyelet) {
  color: var(--hyty-mist);
  font-size: 0.9rem;
  line-height: 1.8;
  max-width: 30rem;
}

.page-faq .faq-contact-list {
  display: grid;
  gap: 0.75rem;
  margin: 1.25rem 0;
}

.page-faq .faq-contact-list div {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 0.75rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.1);
}

.page-faq .faq-contact-list dt {
  font-family: var(--hyty-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--hyty-purple);
  padding-top: 0.15rem;
}

.page-faq .faq-contact-list dd {
  margin: 0;
  color: var(--hyty-white);
  font-family: var(--hyty-font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  word-break: break-word;
}

.page-faq .faq-contact-icp {
  margin-top: 1.25rem;
  color: var(--hyty-mist);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

/* ---------- 动画 ---------- */
@keyframes faqAnswerIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* ---------- 平板及以上 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero {
    padding-top: 2.5rem;
  }

  .page-faq .faq-hero-inner {
    display: grid;
    grid-template-columns: 1fr 18rem;
    gap: 2.5rem;
    align-items: end;
  }

  .page-faq .faq-hero-aside {
    margin-top: 0;
  }

  .page-faq .faq-category {
    padding: 2.25rem 1.75rem;
  }

  .page-faq .faq-figure--cost {
    margin-right: 0;
  }

  .page-faq .faq-figure--sync {
    margin-right: 1.5rem;
  }
}

/* ---------- 桌面宽屏 ---------- */
@media (min-width: 920px) {
  .page-faq .faq-layout {
    grid-template-columns: 15rem minmax(0, 1fr);
    gap: 2.25rem;
    align-items: start;
    padding-top: 2.5rem;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--hyty-header-h) + 2rem);
  }

  .page-faq .faq-main {
    padding-right: clamp(0rem, 4vw, 3.5rem);
  }

  .page-faq .faq-figure {
    margin-left: 18%;
  }

  .page-faq .faq-figure--sync {
    margin-left: 8%;
    margin-right: 2rem;
  }

  .page-faq .faq-contact-panel {
    margin-left: 12%;
    margin-right: -1.5rem;
    padding: 2rem 2.25rem;
  }

  .page-faq .faq-contact-panel::before {
    content: "";
    position: absolute;
    left: -1.5rem;
    top: 1.75rem;
    width: 2.6rem;
    height: 2.6rem;
    background: var(--hyty-lime);
    clip-path: polygon(0 0, 100% 0, 0 100%);
  }
}

/* ---------- 超大屏内容收束 ---------- */
@media (min-width: 1240px) {
  .page-faq .faq-layout {
    grid-template-columns: 17rem minmax(0, 1fr);
    gap: 3.5rem;
  }

  .page-faq .faq-main {
    padding-right: 2rem;
  }

  .page-faq .faq-category {
    padding: 2.5rem 2.25rem;
  }

  .page-faq .faq-a {
    padding-right: 3rem;
  }
}