/* ============================================
   FAQ 页面专属样式 — 作用域 .page-faq
   ============================================ */
.page-faq {
  --faq-card-bg: var(--color-surface);
  --faq-card-border: var(--color-border);
  --faq-card-radius: 10px;
  --faq-hero-min-h: 300px;
  position: relative;
  background: var(--color-bg-dark);
}

/* ---------- 面包屑 ---------- */
.faq-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
  padding-top: 1.5rem;
}
.faq-breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}
.faq-breadcrumb a:hover,
.faq-breadcrumb a:focus-visible {
  color: var(--color-accent);
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.faq-breadcrumb__sep {
  color: var(--color-text-secondary);
  user-select: none;
}
.faq-breadcrumb [aria-current="page"] {
  color: var(--color-text);
  font-weight: 600;
}

/* ---------- HERO ---------- */
.faq-hero {
  position: relative;
  min-height: var(--faq-hero-min-h);
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg-light) 100%);
  border-bottom: 1px solid var(--faq-card-border);
  padding: 1.5rem 0 2.5rem;
}
.faq-hero__inner {
  width: 100%;
}
.faq-hero__grid {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}
.faq-hero__text {
  text-align: center;
}
.faq-hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-primary);
  text-shadow: 0 0 20px rgba(255, 69, 0, 0.3);
  margin: 0 0 0.4rem;
  line-height: 1;
}
.faq-hero__subtitle {
  font-family: var(--font-body);
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}
.faq-hero__img {
  flex-shrink: 0;
  width: 140px;
  height: 140px;
}
.faq-hero__icon {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0.85;
  filter: drop-shadow(0 0 12px rgba(255, 69, 0, 0.15));
}

/* ---------- 搜索框 ---------- */
.faq-search {
  padding: 1.5rem 0 0.5rem;
}
.faq-search__inner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--color-surface);
  border: 1px solid var(--faq-card-border);
  border-radius: var(--faq-card-radius);
  padding: 0.6rem 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  max-width: 640px;
  margin: 0 auto;
}
.faq-search__inner:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(255, 69, 0, 0.2), 0 0 16px rgba(255, 69, 0, 0.08);
}
.faq-search__icon {
  width: 20px;
  height: 20px;
  color: var(--color-text-secondary);
  flex-shrink: 0;
}
.faq-search__input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
  padding: 0;
}
.faq-search__input::placeholder {
  color: var(--color-text-secondary);
  opacity: 0.8;
}

/* ---------- 主体 ---------- */
.faq-body {
  padding: 1.5rem 0 3rem;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* ---------- Section ---------- */
.faq-section {
  position: relative;
  border-radius: var(--faq-card-radius);
}
.faq-section--with-bg {
  overflow: hidden;
}
.faq-section__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.12;
}
.faq-section__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.faq-section__inner {
  position: relative;
  z-index: 1;
  background: rgba(13, 13, 13, 0.6);
  backdrop-filter: blur(2px);
  border-radius: var(--faq-card-radius);
  padding: 1.5rem 1rem;
}
.faq-section .section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text);
  margin: 0 0 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--color-primary);
  display: inline-block;
}

/* ---------- 手风琴卡片 ---------- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.faq-card {
  background: var(--faq-card-bg);
  border: 1px solid var(--faq-card-border);
  border-radius: var(--faq-card-radius);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 8px rgba(255, 69, 0, 0.08);
}
.faq-card[open] {
  border-color: var(--color-primary);
  box-shadow: 0 0 16px rgba(255, 69, 0, 0.12), inset 0 0 40px rgba(255, 69, 0, 0.02);
}

/* summary */
.faq-card__q {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  font-family: var(--font-heading);
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  letter-spacing: 0.02em;
  color: var(--color-text);
  cursor: pointer;
  user-select: none;
  position: relative;
  transition: background var(--transition);
}
.faq-card__q::-webkit-details-marker {
  display: none;
}
.faq-card__q::-moz-list-bullet {
  list-style: none;
}
.faq-card__q::after {
  content: "+";
  font-family: var(--font-heading);
  font-size: 1.6rem;
  line-height: 1;
  color: var(--color-primary);
  transition: transform 0.35s ease;
  flex-shrink: 0;
}
.faq-card[open] .faq-card__q::after {
  content: "−";
  transform: rotate(180deg);
}
.faq-card__q:hover,
.faq-card__q:focus-visible {
  background: rgba(255, 69, 0, 0.04);
  outline: none;
}
.faq-card__q:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
  border-radius: var(--faq-card-radius) var(--faq-card-radius) 0 0;
}

/* 答案容器 — max-height 动画 */
.faq-card__a-wrap {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
  opacity: 0;
}
.faq-card[open] .faq-card__a-wrap {
  max-height: 480px;
  opacity: 1;
}
.faq-card__a {
  padding: 0 1.25rem 1.25rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  border-top: 1px solid rgba(255, 69, 0, 0.12);
  cursor: default;
}
.faq-card__a[data-copy] {
  cursor: copy;
}

/* ---------- CTA 引导 ---------- */
.faq-cta {
  padding: 2rem 0 4rem;
}
.faq-cta__inner {
  text-align: center;
  background: var(--color-surface);
  border: 1px solid var(--faq-card-border);
  border-radius: var(--faq-card-radius);
  padding: 2.5rem 1.5rem;
  max-width: 640px;
  margin: 0 auto;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-cta__inner:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 20px rgba(255, 69, 0, 0.08);
}
.faq-cta__title {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text);
  margin: 0 0 0.5rem;
}
.faq-cta__text {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin: 0 0 1.5rem;
  line-height: 1.6;
}
.faq-cta .btn {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.75rem 2.5rem;
  background: var(--color-primary);
  color: var(--color-text);
  border-radius: 6px;
  transition: background var(--transition), box-shadow var(--transition), transform 0.15s;
  box-shadow: 0 0 12px rgba(255, 69, 0, 0.2);
}
.faq-cta .btn:hover,
.faq-cta .btn:focus-visible {
  background: #e63e00;
  box-shadow: 0 0 24px rgba(255, 69, 0, 0.35);
  transform: scale(1.02);
  outline: none;
}
.faq-cta .btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* ============================================
   桌面响应式
   ============================================ */
@media (min-width: 768px) {
  .faq-hero {
    padding: 2rem 0 3.5rem;
  }
  .faq-hero__grid {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    text-align: left;
  }
  .faq-hero__text {
    text-align: left;
  }
  .faq-hero__subtitle {
    margin: 0;
  }
  .faq-hero__img {
    width: 200px;
    height: 200px;
  }

  .faq-body {
    padding: 2rem 0 4rem;
    gap: 3.5rem;
  }
  .faq-section__inner {
    padding: 2rem 2.5rem;
  }
  .faq-list {
    gap: 1rem;
  }
  .faq-card__q {
    padding: 1.2rem 1.5rem;
    font-size: 1.3rem;
  }
  .faq-card__a {
    padding: 0 1.5rem 1.5rem;
    font-size: 1rem;
  }

  .faq-cta {
    padding: 3rem 0 5rem;
  }
  .faq-cta__inner {
    padding: 3rem 2.5rem;
  }
}

@media (min-width: 1200px) {
  .faq-hero__title {
    font-size: 5rem;
  }
  .faq-body {
    max-width: 880px;
    margin-left: auto;
    margin-right: auto;
  }
}