/* 帮助中心页面专属样式 · 作用于 .page-faq 作用域 */
.page-faq {
  background: var(--color-primary);
  color: var(--color-text);
  overflow-x: hidden;
}

/* ===== Hero 区 ===== */
.page-faq__hero {
  position: relative;
  padding: 32px 0 44px;
  background:
    radial-gradient(ellipse at 82% 18%, rgba(180, 77, 255, 0.20), transparent 58%),
    linear-gradient(140deg, var(--color-primary) 0%, var(--color-primary-alt) 72%, rgba(0, 255, 179, 0.10) 100%);
  border-bottom: 1px solid rgba(180, 77, 255, 0.28);
}

.page-faq__hero::before {
  content: "";
  position: absolute;
  top: 18px;
  right: -48px;
  width: 170px;
  height: 340px;
  background: rgba(180, 77, 255, 0.16);
  transform: rotate(28deg);
  border-radius: var(--radius);
  pointer-events: none;
}

.page-faq__hero::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: 28%;
  width: 120px;
  height: 260px;
  background: rgba(0, 255, 179, 0.10);
  transform: rotate(-16deg);
  border-radius: var(--radius-pill);
  pointer-events: none;
}

.page-faq__hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-faq__hero-copy h1 {
  margin: 18px 0 14px;
  font-family: var(--font-headline);
  font-size: clamp(1.9rem, 4.6vw, 3.2rem);
  line-height: 1.18;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

.page-faq__hero-lead {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 1rem;
  line-height: 1.75;
  max-width: 58ch;
}

.page-faq__hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-faq__hero-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: rgba(0, 255, 179, 0.12);
  border: 1px solid rgba(0, 255, 179, 0.45);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
}

.page-faq__hero-tag--alt {
  background: rgba(180, 77, 255, 0.14);
  border-color: rgba(180, 77, 255, 0.50);
  color: #cd8aff;
}

.page-faq__hero-media {
  border-radius: var(--radius);
  overflow: hidden;
  transform: rotate(-1.2deg);
  border: 1px solid rgba(0, 255, 179, 0.30);
  box-shadow: var(--shadow);
  background: var(--color-primary-alt);
}

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

/* ===== 主布局：目录 + 内容 ===== */
.page-faq__layout {
  padding-top: 40px;
  padding-bottom: 72px;
  display: grid;
  gap: 40px;
}

/* ===== 左侧目录 ===== */
.page-faq__toc {
  background: rgba(18, 42, 84, 0.60);
  border: 1px solid rgba(180, 77, 255, 0.22);
  border-radius: var(--radius);
  padding: 22px 22px 18px;
  align-self: start;
}

.page-faq__toc-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.page-faq__toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq__toc-link {
  display: inline-block;
  padding: 8px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(230, 240, 255, 0.18);
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.88rem;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.page-faq__toc-link:hover,
.page-faq__toc-link:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent);
  outline: none;
}

.page-faq__toc-card {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid rgba(230, 240, 255, 0.14);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.page-faq__toc-card p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

/* ===== 内容区 ===== */
.page-faq__content {
  display: grid;
  gap: 52px;
}

.page-faq__group {
  scroll-margin-top: 120px;
}

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

.page-faq__group-num {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--color-accent);
  background: rgba(0, 255, 179, 0.10);
  border: 1px solid rgba(0, 255, 179, 0.35);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.page-faq__group-copy {
  min-width: 0;
}

.page-faq__group-title {
  margin: 0 0 4px;
  font-family: var(--font-headline);
  font-size: 1.42rem;
  line-height: 1.25;
  letter-spacing: 0.01em;
}

.page-faq__group-desc {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ===== 手风琴 ===== */
.page-faq__acc {
  display: grid;
  gap: 12px;
}

.page-faq__item {
  background: rgba(18, 42, 84, 0.55);
  border: 1px solid rgba(230, 240, 255, 0.12);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
}

.page-faq__item[open] {
  border-color: rgba(0, 255, 179, 0.45);
  background: rgba(18, 42, 84, 0.85);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.22);
}

.page-faq__item summary {
  cursor: pointer;
  padding: 16px 18px 16px 52px;
  position: relative;
  list-style: none;
  color: var(--color-text);
  font-weight: 600;
  line-height: 1.5;
  font-size: 0.97rem;
  transition: color var(--transition);
}

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

.page-faq__item summary::before {
  content: "+";
  position: absolute;
  left: 18px;
  top: 15px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition), background var(--transition), color var(--transition);
}

.page-faq__item[open] summary::before {
  content: "–";
  background: var(--color-accent);
  color: var(--color-primary);
  transform: rotate(180deg);
}

.page-faq__answer {
  padding: 4px 20px 22px 52px;
  color: var(--color-text-secondary);
  font-size: 0.93rem;
  line-height: 1.78;
}

.page-faq__answer p {
  margin: 0 0 10px;
}

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

.page-faq__answer a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(0, 255, 179, 0.45);
}

.page-faq__answer a:hover,
.page-faq__answer a:focus-visible {
  color: var(--color-text);
  text-decoration-color: var(--color-text);
  outline: none;
}

/* ===== 附图 ===== */
.page-faq__figure {
  margin: 22px 0 0;
  padding: 14px;
  background: rgba(18, 42, 84, 0.50);
  border: 1px solid rgba(180, 77, 255, 0.30);
  border-radius: var(--radius);
}

.page-faq__figure-frame {
  border-radius: calc(var(--radius) - 6px);
  overflow: hidden;
}

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

.page-faq__figure-cap {
  margin: 12px 6px 4px;
  font-family: var(--font-mono);
  font-size: 0.80rem;
  color: var(--color-text-secondary);
}

/* ===== 桌面端布局增强 ===== */
@media (min-width: 960px) {
  .page-faq__hero {
    padding: 48px 0 64px;
  }

  .page-faq__hero-inner {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 56px;
  }

  .page-faq__layout {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
    padding-top: 56px;
    padding-bottom: 96px;
  }

  .page-faq__toc {
    position: sticky;
    top: 130px;
  }

  .page-faq__toc-list {
    flex-direction: column;
    gap: 4px;
  }

  .page-faq__toc-link {
    display: block;
    padding: 10px 14px;
    border: 0;
    border-left: 3px solid transparent;
    border-radius: 0;
    font-size: 0.92rem;
  }

  .page-faq__toc-link:hover,
  .page-faq__toc-link:focus-visible {
    border-left-color: var(--color-accent);
    background: rgba(0, 255, 179, 0.08);
    color: var(--color-accent);
  }

  .page-faq__toc-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-faq__group-title {
    font-size: 1.6rem;
  }

  .page-faq__group-desc {
    font-size: 1rem;
  }

  .page-faq__answer {
    font-size: 0.95rem;
  }
}