.page-faq {
  --faq-radius: 18px;
  --faq-space-section: clamp(64px, 10vw, 104px);
  --faq-content-spacing: 22px;
  background: var(--bg-dark);
  color: var(--text-primary);
  overflow-x: hidden;
}

.page-faq .faq-container {
  width: min(var(--container-width), 100%);
  margin-inline: auto;
  padding-inline: 24px;
}

/* ========== Hero ========== */
.page-faq .faq-hero {
  position: relative;
  padding: 40px 0 56px;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(560px 320px at 86% 6%, rgba(255, 59, 48, 0.20), transparent 62%),
    radial-gradient(520px 300px at 8% 82%, rgba(10, 132, 255, 0.16), transparent 64%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -80px;
  top: 16%;
  width: 240px;
  height: 240px;
  background: var(--gradient-blue-green);
  opacity: 0.12;
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.page-faq .faq-hero__visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.page-faq .faq-hero__img {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border-subtle);
  box-shadow: 0 20px 60px rgba(10, 132, 255, 0.16), 0 8px 24px rgba(255, 59, 48, 0.10);
}

.page-faq .faq-hero__tagline {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--text-secondary);
  text-transform: uppercase;
  border-left: 3px solid var(--primary-red);
  padding: 0 0 0 12px;
  margin: 24px 0 0;
}

.page-faq .faq-hero__content h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 56px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 14px 0 18px;
  max-width: 780px;
  color: var(--text-primary);
}

.page-faq .faq-hero__lead {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 0 24px;
}

.page-faq .faq-hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-hero__badges .badge {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.4;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.page-faq .faq-hero__badges .badge--red {
  background: rgba(255, 59, 48, 0.12);
  border: 1px solid rgba(255, 59, 48, 0.42);
  color: var(--primary-red);
}

.page-faq .faq-hero__badges .badge--blue {
  background: rgba(10, 132, 255, 0.12);
  border: 1px solid rgba(10, 132, 255, 0.42);
  color: var(--primary-blue);
}

.page-faq .faq-hero__badges .badge--green {
  background: rgba(48, 209, 88, 0.12);
  border: 1px solid rgba(48, 209, 88, 0.42);
  color: var(--primary-green);
}

.page-faq .faq-hero__badges .badge:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.35);
}

/* ========== 帮助主体布局 ========== */
.page-faq .faq-main {
  padding: 8px 0 64px;
}

.page-faq .faq-main__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-content-spacing);
}

/* ========== 目录 ========== */
.page-faq .faq-toc__title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--text-secondary);
  margin: 0 0 14px;
}

.page-faq .faq-toc__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-faq .faq-toc__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-toc__list li {
  flex: 0 0 auto;
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  transition: border-color var(--transition-fast);
}

.page-faq .faq-toc__list a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.page-faq .faq-toc__list a:hover {
  color: var(--primary-blue);
}

.page-faq .faq-toc__list a:active {
  transform: scale(0.97);
}

.page-faq .faq-toc__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--primary-red);
  transition: color var(--transition-fast);
}

.page-faq .faq-toc__list a:hover .faq-toc__num {
  color: var(--primary-blue);
}

.page-faq .faq-toc__hint {
  display: none;
}

/* ========== FAQ群组 ========== */
.page-faq .faq-content {
  display: flex;
  flex-direction: column;
  gap: 48px;
  min-width: 0;
}

.page-faq .faq-group {
  position: relative;
  min-width: 0;
}

.page-faq .faq-group:not(:last-child)::after {
  content: "";
  display: block;
  height: 1px;
  background: linear-gradient(90deg, var(--primary-red), var(--primary-blue), var(--primary-green));
  opacity: 0.28;
  margin: 48px 0 0;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 800;
  line-height: 1;
  background: var(--gradient-red-blue);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  flex: 0 0 auto;
}

.page-faq .faq-group__head h2 {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  margin: 0 0 6px;
  color: var(--text-primary);
}

.page-faq .faq-group__head p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}

/* ========== 手风琴项 ========== */
.page-faq .faq-item {
  position: relative;
  border: 1px solid var(--border-subtle);
  border-radius: var(--faq-radius);
  background: var(--bg-panel);
  margin: 0 0 14px;
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--gradient-blue-green);
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: 2;
}

.page-faq .faq-item[open]::before {
  opacity: 1;
}

.page-faq .faq-item:hover {
  border-color: rgba(10, 132, 255, 0.55);
}

.page-faq .faq-item[open] {
  border-color: rgba(10, 132, 255, 0.50);
  box-shadow: 0 16px 40px rgba(10, 132, 255, 0.08), 0 4px 16px rgba(0, 0, 0, 0.35);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  list-style: none;
  cursor: pointer;
  padding: 20px 22px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--text-primary);
  transition: color var(--transition-fast), background var(--transition-fast);
  user-select: none;
}

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

.page-faq .faq-item summary:hover {
  background: rgba(10, 132, 255, 0.05);
}

.page-faq .faq-item summary::after {
  content: "";
  width: 10px;
  height: 10px;
  flex: 0 0 10px;
  border-right: 2px solid var(--text-secondary);
  border-bottom: 2px solid var(--text-secondary);
  transform: rotate(45deg);
  transition: transform var(--transition-base), border-color var(--transition-fast);
  margin-top: -4px;
}

.page-faq .faq-item[open] summary::after {
  transform: rotate(225deg);
  border-color: var(--primary-blue);
}

.page-faq .faq-item[open] summary {
  color: var(--primary-blue);
}

.page-faq .faq-item__body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--transition-slow);
}

.page-faq .faq-item[open] .faq-item__body {
  grid-template-rows: 1fr;
}

.page-faq .faq-item__content {
  overflow: hidden;
  min-height: 0;
  padding: 0 22px 22px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.page-faq .faq-item__content p {
  margin: 0;
  border-left: 2px solid rgba(10, 132, 255, 0.35);
  padding-left: 16px;
}

.page-faq .faq-item__content a {
  color: var(--primary-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}

.page-faq .faq-item__content a:hover {
  color: var(--primary-green);
}

/* ========== 场景展示 ========== */
.page-faq .faq-scene {
  padding: 0 0 80px;
}

.page-faq .faq-scene__card {
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: calc(var(--faq-radius) + 6px);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr;
}

.page-faq .faq-scene__card img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  display: block;
}

.page-faq .faq-scene__copy {
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: flex-start;
}

.page-faq .faq-scene__copy h2 {
  font-size: 24px;
  font-weight: 800;
  font-family: var(--font-display);
  margin: 0;
  color: var(--text-primary);
}

.page-faq .faq-scene__copy p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
}

.page-faq .faq-scene__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

/* ========== 桌面端增强 ========== */
@media (min-width: 720px) {
  .page-faq .faq-scene__card {
    grid-template-columns: 420px 1fr;
    align-items: stretch;
  }

  .page-faq .faq-scene__card img {
    height: 100%;
    min-height: 280px;
  }

  .page-faq .faq-scene__copy {
    padding: 40px 42px;
    justify-content: center;
  }
}

@media (min-width: 920px) {
  .page-faq .faq-hero {
    padding: 56px 0 72px;
  }

  .page-faq .faq-hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 48px;
    align-items: center;
  }

  .page-faq .faq-hero__img {
    width: 220px;
    height: 220px;
  }

  .page-faq .faq-main__layout {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--header-height) + 20px);
    background: var(--bg-panel);
    border: 1px solid var(--border-subtle);
    border-radius: var(--faq-radius);
    padding: 20px;
  }

  .page-faq .faq-toc__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
  }

  .page-faq .faq-toc__list li {
    flex: none;
    border: none;
    border-bottom: 1px solid rgba(44, 44, 58, 0.85);
    border-radius: 0;
  }

  .page-faq .faq-toc__list li:last-child {
    border-bottom: none;
  }

  .page-faq .faq-toc__list a {
    padding: 14px 8px;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
  }

  .page-faq .faq-toc__list a::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--gradient-blue-green);
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform var(--transition-base);
    z-index: 1;
  }

  .page-faq .faq-toc__list a:hover::before {
    transform: scaleY(1);
  }

  .page-faq .faq-toc__num {
    font-size: 14px;
  }

  .page-faq .faq-toc__hint {
    display: block;
    margin: 16px 8px 0;
    font-size: 13px;
    line-height: 1.6;
    color: var(--text-secondary);
    border-top: 1px dashed var(--border-subtle);
    padding-top: 14px;
  }
}