.page-faq {
  --faq-border: rgba(11, 31, 58, 0.14);
  --faq-line: rgba(11, 31, 58, 0.1);
  background: var(--c-paper);
  color: var(--c-ink);
}

.page-faq section {
  padding-block: clamp(3rem, 7vw, 5.5rem);
}

/* ===== 首屏：帮助中心 ===== */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--c-deep);
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(245, 247, 250, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 247, 250, 0.05) 1px, transparent 1px);
  background-size: 32px 32px;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  top: -30%;
  width: 50%;
  height: 150%;
  background: var(--c-neon);
  opacity: 0.07;
  transform: rotate(18deg);
  pointer-events: none;
}

.page-faq .faq-hero .breadcrumb {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  font-size: 0.875rem;
  color: rgba(245, 247, 250, 0.7);
}

.page-faq .faq-hero .breadcrumb a {
  color: var(--c-neon);
  text-decoration: none;
}

.page-faq .faq-hero__layout {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-faq .faq-hero__content {
  max-width: 640px;
}

.page-faq .faq-hero h1 {
  margin: 0.75rem 0 1rem;
  font-size: clamp(1.7rem, 4vw, 2.7rem);
  line-height: 1.2;
  color: var(--c-paper);
}

.page-faq .faq-hero__lead {
  max-width: 540px;
  margin: 0;
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  line-height: 1.7;
  color: rgba(245, 247, 250, 0.78);
}

.page-faq .faq-hero__figure {
  position: relative;
  z-index: 1;
  margin: 0;
  border: 1px solid rgba(0, 255, 136, 0.5);
  box-shadow: 14px 14px 0 rgba(0, 255, 136, 0.12);
  transform: rotate(1.5deg);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-hero__tags {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(245, 247, 250, 0.16);
}

.page-faq .faq-hero__tag-label {
  margin-right: 0.25rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(245, 247, 250, 0.6);
}

.page-faq .faq-hero .tag {
  color: var(--c-paper);
  border-color: rgba(245, 247, 250, 0.35);
  transition: color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-hero .tag:hover {
  color: var(--c-neon);
  border-color: var(--c-neon);
  transform: translateY(-2px);
}

/* ===== 热门问题 ===== */
.page-faq .faq-hot {
  background: var(--c-paper);
}

.page-faq .faq-hot__grid {
  display: grid;
  gap: 1rem;
  align-items: start;
  margin-top: 2rem;
}

/* ===== 折叠问答卡片 ===== */
.page-faq .faq-card {
  background: #fff;
  border: 1px solid var(--faq-border);
  border-left: 4px solid transparent;
  box-shadow: 0 1px 0 rgba(11, 31, 58, 0.02);
  transition: border-color 0.22s ease, box-shadow 0.22s ease, transform 0.22s ease;
}

.page-faq .faq-card:hover {
  border-color: rgba(11, 31, 58, 0.22);
  border-left-color: var(--c-neon);
  box-shadow: 8px 8px 0 rgba(11, 31, 58, 0.07);
  transform: translateY(-2px);
}

.page-faq .faq-card[open] {
  border-color: rgba(0, 255, 136, 0.45);
  border-left-color: var(--c-neon);
  box-shadow: 8px 8px 0 rgba(11, 31, 58, 0.05);
}

.page-faq .faq-card summary {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1.1rem 1.2rem;
  list-style: none;
  cursor: pointer;
}

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

.page-faq .faq-card__index {
  flex: none;
  min-width: 1.6rem;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--c-orange);
}

.page-faq .faq-card__question {
  flex: 1;
  font-weight: 800;
  line-height: 1.4;
  color: var(--c-deep);
}

.page-faq .faq-card__toggle {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--c-paper);
}

.page-faq .faq-card__toggle::before,
.page-faq .faq-card__toggle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--c-deep);
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.page-faq .faq-card__toggle::before {
  width: 10px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-card__toggle::after {
  width: 2px;
  height: 10px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-card[open] .faq-card__toggle::after {
  opacity: 0;
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .faq-card__answer {
  padding: 0 1.2rem 1.25rem;
}

.page-faq .faq-card__answer p {
  margin: 0.75rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--c-neon);
  font-size: 0.95rem;
  line-height: 1.75;
  color: rgba(18, 18, 18, 0.82);
}

.page-faq .faq-card__answer a {
  color: var(--c-blue);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--c-neon);
  text-underline-offset: 3px;
}

/* ===== 按功能分类 ===== */
.page-faq .faq-directory__layout {
  display: grid;
  gap: 2rem;
  align-items: start;
  margin-top: 2.5rem;
}

.page-faq .faq-sidebar {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1.25rem;
  background: var(--c-deep);
}

.page-faq .faq-sidebar::before {
  content: "";
  position: absolute;
  top: -6px;
  right: 6px;
  bottom: 6px;
  left: -6px;
  border: 1px solid var(--c-neon);
  pointer-events: none;
}

.page-faq .faq-sidebar__title {
  padding-bottom: 0.75rem;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid rgba(245, 247, 250, 0.2);
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-neon);
}

.page-faq .faq-sidebar__item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.75rem 0.85rem;
  border: 1px solid transparent;
  font-size: 0.92rem;
  font-weight: 800;
  color: rgba(245, 247, 250, 0.85);
  text-decoration: none;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-sidebar__item span {
  font-size: 0.78rem;
  font-weight: 900;
  color: var(--c-orange);
}

.page-faq .faq-sidebar__item:hover,
.page-faq .faq-sidebar__item:focus-visible {
  border-color: var(--c-orange);
  background: rgba(255, 107, 44, 0.1);
  color: var(--c-paper);
}

.page-faq .faq-cat {
  scroll-margin-top: calc(var(--header-total) + 1rem);
}

.page-faq .faq-cat + .faq-cat {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-cat > h3 {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1.25rem;
  font-size: clamp(1.2rem, 2.4vw, 1.5rem);
  color: var(--c-deep);
}

.page-faq .faq-cat > h3::after {
  content: "";
  width: 44px;
  height: 3px;
  background: var(--c-neon);
}

.page-faq .faq-cat:target > h3 {
  color: var(--c-orange);
}

.page-faq .faq-cat:target > h3::after {
  background: var(--c-orange);
}

.page-faq .faq-cat .faq-card + .faq-card {
  margin-top: 0.8rem;
}

/* ===== 使用指南 ===== */
.page-faq .faq-guide {
  background: var(--c-deep);
  color: var(--c-paper);
}

.page-faq .faq-guide .section-head {
  color: var(--c-paper);
}

.page-faq .faq-guide .section-label {
  color: var(--c-neon);
}

.page-faq .faq-guide .section-title,
.page-faq .faq-guide h2 {
  color: var(--c-paper);
}

.page-faq .faq-guide__layout {
  display: grid;
  gap: 2.5rem;
  margin-top: 2.5rem;
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-steps__item {
  position: relative;
  display: flex;
  gap: 1.2rem;
  padding: 1rem 0;
}

.page-faq .faq-steps__item:not(:last-child) {
  border-bottom: 1px solid rgba(245, 247, 250, 0.14);
}

.page-faq .faq-steps__item:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 23px;
  top: calc(48px + 1rem);
  bottom: 0;
  width: 2px;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 255, 136, 0.6) 0 6px,
    transparent 6px 12px
  );
}

.page-faq .faq-steps__num {
  position: relative;
  z-index: 1;
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--c-deep);
  background: var(--c-neon);
}

.page-faq .faq-steps__body {
  padding-top: 0.35rem;
}

.page-faq .faq-steps__title {
  margin: 0 0 0.3rem;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--c-paper);
}

.page-faq .faq-steps__body p:last-child {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.65;
  color: rgba(245, 247, 250, 0.72);
}

.page-faq .faq-guide__figure {
  margin: 0;
  border: 1px solid rgba(0, 255, 136, 0.4);
  box-shadow: 12px 12px 0 rgba(0, 255, 136, 0.1);
  transform: rotate(-1deg);
}

.page-faq .faq-guide__figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-guide__figure figcaption {
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  color: rgba(245, 247, 250, 0.7);
  background: rgba(11, 31, 58, 0.6);
}

/* ===== 联系支持 ===== */
.page-faq .faq-support {
  background: var(--c-paper);
}

.page-faq .faq-support__panel {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.5rem;
  padding: clamp(1.5rem, 4vw, 3rem);
  background: #fff;
  border: 1px solid var(--faq-border);
  border-left: 6px solid var(--c-orange);
}

.page-faq .faq-support__lead {
  margin: 0.75rem 0 0;
  max-width: 52em;
  line-height: 1.75;
}

.page-faq .faq-support__channels {
  display: grid;
  gap: 0.6rem;
  align-content: start;
}

.page-faq .faq-support__item {
  padding: 0.9rem 1rem;
  background: var(--c-paper);
  border-left: 3px solid var(--c-neon);
}

.page-faq .faq-support__label {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-orange);
}

.page-faq .faq-support__value {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-deep);
  word-break: break-word;
}

.page-faq .faq-support__cta {
  grid-column: 1 / -1;
}

.page-faq .faq-support__cta .btn {
  margin-top: 0.5rem;
}

/* ===== 响应式 ===== */
@media (min-width: 720px) {
  .page-faq .faq-hot__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 768px) {
  .page-faq .faq-hero__layout {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 3rem;
  }
}

@media (min-width: 800px) {
  .page-faq .faq-support__panel {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 2rem;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-guide__layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: center;
    gap: 3.5rem;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-directory__layout {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 3rem;
  }

  .page-faq .faq-sidebar {
    position: sticky;
    top: calc(var(--header-total) + 1.5rem);
  }
}