/* ===== 页面专属 CSS：帮助中心（.page-faq） ===== */
.page-faq {
  --faq-hero-bg: linear-gradient(160deg, var(--color-deep-black) 0%, var(--color-deep-blue) 60%, #0f1f38 100%);
  --faq-card-hover: rgba(106, 78, 156, 0.08);
  --faq-border-light: rgba(42, 61, 92, 0.5);
  --faq-gold-dim: rgba(245, 215, 110, 0.25);
  --faq-step-size: clamp(2.5rem, 6vw, 3.75rem);
  --faq-radius: var(--radius-md);
  color: var(--color-cold-white);
  background: var(--faq-hero-bg);
  min-height: 100vh;
  position: relative;
}

/* ---- 面包屑 ---- */
.page-faq .breadcrumb {
  padding: 1.25rem 1rem 0;
  max-width: var(--content-max-width);
  margin: 0 auto;
  font-size: var(--caption-size);
  color: var(--color-text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  align-items: center;
}
.page-faq .breadcrumb a {
  color: var(--color-galaxy-purple);
  text-decoration: none;
  transition: color var(--transition-smooth);
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--color-star-gold);
}
.page-faq .breadcrumb__sep {
  color: var(--color-border);
  margin: 0 0.125rem;
}

/* ---- 英雄区 ---- */
.page-faq .faq__hero {
  padding: 1.5rem 1rem 3rem;
  position: relative;
  overflow: hidden;
}
.page-faq .faq__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 40%, rgba(106, 78, 156, 0.08) 0%, transparent 60%),
    radial-gradient(circle at 80% 70%, rgba(245, 215, 110, 0.05) 0%, transparent 50%),
    repeating-linear-gradient(0deg, transparent, transparent 48px, rgba(42, 61, 92, 0.15) 48px, rgba(42, 61, 92, 0.15) 49px),
    repeating-linear-gradient(90deg, transparent, transparent 48px, rgba(42, 61, 92, 0.15) 48px, rgba(42, 61, 92, 0.15) 49px);
  pointer-events: none;
}
.page-faq .faq__title {
  font-family: var(--font-heading);
  font-size: var(--heading-size);
  font-weight: 700;
  color: var(--color-bright-white);
  letter-spacing: 0.03em;
  margin: 0 0 0.5rem;
  line-height: 1.2;
  position: relative;
}
.page-faq .faq__subtitle {
  font-family: var(--font-body);
  font-size: calc(var(--body-size) * 1.1);
  color: var(--color-text-muted);
  max-width: 32em;
  margin: 0 0 1.75rem;
  line-height: 1.6;
  position: relative;
}

/* ---- 搜索框 ---- */
.page-faq .faq__search-wrapper {
  position: relative;
  max-width: 32rem;
}
.page-faq .faq__search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
  z-index: 1;
}
.page-faq .faq__search-input {
  width: 100%;
  padding: 0.875rem 1rem 0.875rem 3rem;
  background: rgba(27, 42, 63, 0.7);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-cold-white);
  font-family: var(--font-body);
  font-size: var(--body-size);
  backdrop-filter: blur(8px);
  transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth);
  outline: none;
  box-sizing: border-box;
}
.page-faq .faq__search-input::placeholder {
  color: var(--color-text-muted);
  opacity: 0.7;
}
.page-faq .faq__search-input:focus {
  border-color: var(--color-galaxy-purple);
  box-shadow: 0 0 0 3px rgba(106, 78, 156, 0.2);
}

/* ---- 主体布局 ---- */
.page-faq .faq__body {
  padding: 0 1rem 3rem;
}
.page-faq .faq__layout {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* ---- 分类标签 ---- */
.page-faq .faq__categories {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  position: relative;
}
.page-faq .faq__cat-btn {
  font-family: var(--font-body);
  font-size: var(--caption-size);
  padding: 0.5rem 1.125rem;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-smooth);
  white-space: nowrap;
}
.page-faq .faq__cat-btn:hover,
.page-faq .faq__cat-btn:focus-visible {
  border-color: var(--color-galaxy-purple);
  color: var(--color-cold-white);
}
.page-faq .faq__cat-btn.is-active {
  background: var(--color-galaxy-purple);
  border-color: var(--color-galaxy-purple);
  color: var(--color-bright-white);
  box-shadow: 0 2px 12px rgba(106, 78, 156, 0.3);
}

/* ---- 常见问题列表 ---- */
.page-faq .faq__list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.page-faq .faq__item {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--faq-radius);
  overflow: hidden;
  transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}
.page-faq .faq__item:hover {
  border-color: rgba(106, 78, 156, 0.4);
}
.page-faq .faq__item[open] {
  border-color: rgba(106, 78, 156, 0.5);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}
.page-faq .faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1.125rem 1.25rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-heading);
  font-size: calc(var(--body-size) * 1.05);
  font-weight: 600;
  color: var(--color-cold-white);
  line-height: 1.4;
  user-select: none;
  transition: background var(--transition-smooth);
}
.page-faq .faq__question::-webkit-details-marker {
  display: none;
}
.page-faq .faq__question::marker {
  content: "";
  display: none;
}
.page-faq .faq__question:hover {
  background: var(--faq-card-hover);
}
.page-faq .faq__q-text {
  flex: 1;
}
.page-faq .faq__q-icon {
  flex-shrink: 0;
  color: var(--color-galaxy-purple);
  transition: transform var(--transition-smooth);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
}
.page-faq .faq__item[open] .faq__q-icon {
  transform: rotate(90deg);
}
.page-faq .faq__answer {
  padding: 0 1.25rem 1.125rem;
  font-family: var(--font-body);
  font-size: var(--body-size);
  line-height: 1.7;
  color: var(--color-text-muted);
  border-top: 1px solid var(--faq-border-light);
  margin-top: 0;
  animation: faqFadeIn 0.25s ease-out;
}
.page-faq .faq__answer a {
  color: var(--color-galaxy-purple);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.page-faq .faq__answer a:hover {
  color: var(--color-star-gold);
}
@keyframes faqFadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- 侧边栏 ---- */
.page-faq .faq__aside {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.page-faq .faq__aside-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--faq-radius);
  padding: 1.5rem;
  text-align: center;
}
.page-faq .faq__aside-img {
  width: 100%;
  max-width: 180px;
  height: auto;
  aspect-ratio: 1/1;
  object-fit: contain;
  margin: 0 auto 1rem;
  display: block;
  border-radius: var(--radius-sm);
  opacity: 0.85;
}
.page-faq .faq__aside-title {
  font-family: var(--font-heading);
  font-size: calc(var(--body-size) * 1.25);
  font-weight: 600;
  color: var(--color-bright-white);
  margin: 0 0 0.5rem;
}
.page-faq .faq__aside-title--sm {
  font-size: var(--body-size);
  margin-bottom: 0.75rem;
  text-align: left;
}
.page-faq .faq__aside-text {
  font-family: var(--font-body);
  font-size: var(--caption-size);
  color: var(--color-text-muted);
  margin: 0 0 1rem;
  line-height: 1.5;
}
.page-faq .btn--primary {
  display: inline-block;
  padding: 0.625rem 1.5rem;
  background: var(--color-galaxy-purple);
  color: var(--color-bright-white);
  border: none;
  border-radius: var(--radius-lg);
  font-family: var(--font-body);
  font-size: var(--caption-size);
  font-weight: 500;
  text-decoration: none;
  transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
  cursor: pointer;
}
.page-faq .btn--primary:hover {
  background: #7c5fb0;
  box-shadow: 0 4px 16px rgba(106, 78, 156, 0.35);
}
.page-faq .faq__aside-card--links {
  text-align: left;
}
.page-faq .faq__quick-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.page-faq .faq__quick-links li {
  padding: 0;
}
.page-faq .faq__quick-links a {
  color: var(--color-galaxy-purple);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: var(--caption-size);
  padding: 0.375rem 0;
  display: inline-block;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-smooth), border-color var(--transition-smooth);
}
.page-faq .faq__quick-links a:hover {
  color: var(--color-star-gold);
  border-bottom-color: var(--color-star-gold);
}

/* ---- 新用户指引 ---- */
.page-faq .faq__guide {
  padding: 3rem 1rem 4rem;
  position: relative;
  background: rgba(5, 11, 20, 0.5);
  border-top: 1px solid var(--color-border);
}
.page-faq .faq__guide .section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--color-bright-white);
  margin: 0 0 0.25rem;
  letter-spacing: 0.02em;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.page-faq .faq__guide .section-title__sub {
  font-size: var(--caption-size);
  font-weight: 400;
  color: var(--color-star-gold);
  background: var(--faq-gold-dim);
  padding: 0.125rem 0.75rem;
  border-radius: var(--radius-sm);
  letter-spacing: 0.04em;
}
.page-faq .faq__guide-intro {
  font-family: var(--font-body);
  font-size: calc(var(--body-size) * 1.05);
  color: var(--color-text-muted);
  margin: 0.5rem 0 2rem;
  max-width: 36em;
  line-height: 1.6;
}
.page-faq .guide__steps {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2.5rem;
}
.page-faq .guide__step {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--faq-radius);
  padding: 1.125rem 1.25rem;
  transition: border-color var(--transition-smooth), background var(--transition-smooth);
}
.page-faq .guide__step:hover {
  border-color: rgba(106, 78, 156, 0.35);
  background: rgba(27, 42, 63, 0.8);
}
.page-faq .guide__step-num {
  flex-shrink: 0;
  width: var(--faq-step-size);
  height: var(--faq-step-size);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-galaxy-purple), #4a2d7a);
  color: var(--color-bright-white);
  font-family: var(--font-heading);
  font-size: calc(var(--faq-step-size) * 0.48);
  font-weight: 700;
  border-radius: 50%;
  box-shadow: 0 2px 12px rgba(106, 78, 156, 0.25);
  line-height: 1;
}
.page-faq .guide__step-content {
  flex: 1;
  min-width: 0;
}
.page-faq .guide__step-title {
  font-family: var(--font-heading);
  font-size: calc(var(--body-size) * 1.1);
  font-weight: 600;
  color: var(--color-cold-white);
  margin: 0 0 0.25rem;
}
.page-faq .guide__step-desc {
  font-family: var(--font-body);
  font-size: var(--caption-size);
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.5;
}
.page-faq .guide__figure {
  margin-top: 1.5rem;
  border-radius: var(--faq-radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: rgba(5, 11, 20, 0.4);
}
.page-faq .guide__flow-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 800 / 300;
}

/* ---- 桌面端（≥768px） ---- */
@media (min-width: 768px) {
  .page-faq .breadcrumb {
    padding: 1.5rem 2rem 0;
  }
  .page-faq .faq__hero {
    padding: 2rem 2rem 4rem;
  }
  .page-faq .faq__subtitle {
    font-size: calc(var(--body-size) * 1.2);
  }
  .page-faq .faq__body {
    padding: 0 2rem 4rem;
  }
  .page-faq .faq__layout {
    flex-direction: row;
    align-items: flex-start;
    gap: 3rem;
  }
  .page-faq .faq__main {
    flex: 1 1 65%;
    min-width: 0;
  }
  .page-faq .faq__aside {
    flex: 0 0 clamp(260px, 30%, 320px);
    position: sticky;
    top: calc(var(--nav-height) + 1.5rem);
  }
  .page-faq .faq__aside-img {
    max-width: 220px;
  }
  .page-faq .faq__aside-card {
    padding: 2rem 1.5rem;
  }
  .page-faq .faq__guide {
    padding: 4rem 2rem 5rem;
  }
  .page-faq .guide__steps {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
  }
  .page-faq .guide__step {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1.5rem 1rem;
  }
  .page-faq .guide__step-num {
    margin-bottom: 0.75rem;
  }
  .page-faq .guide__step-title {
    font-size: calc(var(--body-size) * 1.05);
  }
  .page-faq .guide__step-desc {
    font-size: var(--caption-size);
  }
}

/* ---- 大桌面端（≥1024px） ---- */
@media (min-width: 1024px) {
  .page-faq .faq__hero {
    padding: 2.5rem 2rem 5rem;
  }
  .page-faq .faq__body {
    padding: 0 2rem 5rem;
  }
  .page-faq .faq__layout {
    gap: 4rem;
  }
  .page-faq .faq__aside {
    flex-basis: 300px;
  }
  .page-faq .faq__guide {
    padding: 5rem 2rem 6rem;
  }
  .page-faq .guide__steps {
    gap: 1.25rem;
  }
}

/* ---- 极窄屏安全 ---- */
@media (max-width: 360px) {
  .page-faq .faq__search-input {
    font-size: 0.875rem;
    padding: 0.75rem 0.75rem 0.75rem 2.5rem;
  }
  .page-faq .faq__cat-btn {
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
  }
  .page-faq .faq__question {
    padding: 0.875rem 1rem;
    font-size: calc(var(--body-size) * 0.95);
  }
  .page-faq .faq__answer {
    padding: 0 1rem 0.875rem;
  }
  .page-faq .guide__step {
    padding: 0.875rem 1rem;
  }
}