/* ===== 页面专属 CSS：支持中心（page-faq） ===== */
.page-faq {
  --faq-primary: #1A5CFF;
  --faq-accent: #FF6B35;
  --faq-bg: #F5F5F0;
  --faq-card-bg: #FFFFFF;
  --faq-text: #2C2C2C;
  --faq-neutral: #4A4A4A;
  --faq-border: #D1D1D1;
  --faq-border-light: #E8E8E3;
  --faq-highlight: #00D4AA;
  --faq-radius: 14px;
  --faq-radius-lg: 24px;
  --faq-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  font-family: var(--font-body, 'Inter', system-ui, sans-serif);
  color: var(--faq-text);
  background-color: var(--faq-bg);
  scroll-behavior: smooth;
}

/* ===== 面包屑 ===== */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1rem 1.5rem;
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  font-size: 0.875rem;
  color: var(--faq-neutral);
}

.page-faq .breadcrumb__item a {
  color: var(--faq-primary);
  text-decoration: none;
  transition: color var(--faq-transition);
}

.page-faq .breadcrumb__item a:hover,
.page-faq .breadcrumb__item a:focus-visible {
  color: var(--faq-accent);
  outline: none;
}

.page-faq .breadcrumb__item--active {
  font-weight: 600;
  color: var(--faq-neutral);
}

.page-faq .breadcrumb__separator {
  margin: 0 0.25rem;
  color: var(--faq-border);
}

/* ===== 框景首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  padding: 2.5rem 1.5rem 3rem;
  margin: 0 auto 2rem;
  max-width: var(--container-max, 1200px);
  background: linear-gradient(135deg, rgba(26,92,255,0.05), rgba(255,107,53,0.05));
  border: 2px solid var(--faq-border-light);
  border-radius: var(--faq-radius-lg);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 10% 30%, rgba(26,92,255,0.06) 0%, transparent 60%),
    radial-gradient(circle at 90% 70%, rgba(255,107,53,0.05) 0%, transparent 60%);
  pointer-events: none;
}

.page-faq .faq-hero__title {
  font-family: var(--font-heading, 'Inter', 'PingFang SC', sans-serif);
  font-size: 2rem;
  font-weight: 700;
  font-style: italic;
  margin: 0 0 0.5rem;
  line-height: 1.2;
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__subtitle {
  font-size: 1rem;
  color: var(--faq-neutral);
  margin: 0 0 1.5rem;
  line-height: 1.5;
  max-width: 480px;
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__search {
  position: relative;
  max-width: 480px;
  z-index: 1;
}

.page-faq .faq-hero__search-input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.75rem;
  border: 2px solid var(--faq-border);
  border-radius: var(--faq-radius);
  font-family: var(--font-body, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: 0.95rem;
  color: var(--faq-text);
  background-color: var(--faq-card-bg);
  transition: border-color var(--faq-transition), box-shadow var(--faq-transition);
  appearance: none;
}

.page-faq .faq-hero__search-input::placeholder {
  color: #999;
}

.page-faq .faq-hero__search-input:focus {
  outline: none;
  border-color: var(--faq-primary);
  box-shadow: 0 0 0 3px rgba(26,92,255,0.12);
}

.page-faq .faq-hero__search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  color: var(--faq-neutral);
  pointer-events: none;
}

/* ===== 主体布局 ===== */
.page-faq .container {
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding-bottom: 4rem;
}

/* ===== 左导航 ===== */
.page-faq .faq-layout__nav {
  background: var(--faq-card-bg);
  border-radius: var(--faq-radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-card, 0 2px 12px rgba(26,92,255,0.08));
  height: fit-content;
  position: sticky;
  top: calc(var(--header-height, 72px) + 1rem);
}

.page-faq .faq-layout__nav-title {
  font-family: var(--font-heading, 'Inter', 'PingFang SC', sans-serif);
  font-size: 1.125rem;
  font-weight: 700;
  font-style: italic;
  margin: 0 0 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--faq-primary);
  color: var(--faq-text);
}

.page-faq .faq-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.page-faq .faq-nav-list__link {
  display: block;
  padding: 0.625rem 0.75rem;
  color: var(--faq-neutral);
  text-decoration: none;
  border-radius: var(--faq-radius);
  font-size: 0.95rem;
  transition: background var(--faq-transition), color var(--faq-transition);
}

.page-faq .faq-nav-list__link:hover,
.page-faq .faq-nav-list__link:focus-visible {
  background: rgba(26,92,255,0.08);
  color: var(--faq-primary);
  outline: none;
}

/* ===== 右内容 ===== */
.page-faq .faq-layout__content {
  flex: 1;
  min-width: 0;
}

/* ===== 章节 ===== */
.page-faq .faq-section {
  margin-bottom: 2.5rem;
}

.page-faq .faq-section .chapter {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.page-faq .faq-section .chapter__number {
  font-family: var(--font-heading, 'Inter', 'PingFang SC', sans-serif);
  font-size: 2rem;
  font-weight: 800;
  font-style: italic;
  color: var(--faq-primary);
  line-height: 1;
  opacity: 0.4;
}

.page-faq .faq-section .chapter__title {
  font-size: 1.5rem;
  font-weight: 700;
  font-style: italic;
  margin: 0;
  color: var(--faq-text);
}

/* ===== 折叠手风琴 ===== */
.page-faq .faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.page-faq .faq-accordion__item {
  background: var(--faq-card-bg);
  border-radius: var(--faq-radius);
  box-shadow: var(--shadow-card, 0 2px 12px rgba(26,92,255,0.08));
  overflow: hidden;
  transition: box-shadow var(--faq-transition);
}

.page-faq .faq-accordion__item:hover {
  box-shadow: var(--shadow-card-hover, 0 8px 28px rgba(26,92,255,0.16));
}

.page-faq .faq-accordion__trigger {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 1rem 1.25rem;
  border: none;
  background: none;
  font-family: var(--font-body, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: 0.975rem;
  font-weight: 600;
  color: var(--faq-text);
  cursor: pointer;
  text-align: left;
  transition: background var(--faq-transition);
  appearance: none;
}

.page-faq .faq-accordion__trigger:hover,
.page-faq .faq-accordion__trigger:focus-visible {
  background: rgba(26,92,255,0.04);
  outline: none;
}

.page-faq .faq-accordion__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--faq-primary);
  transition: transform var(--faq-transition);
}

.page-faq .faq-accordion__item[data-open] .faq-accordion__icon {
  transform: rotate(45deg);
}

.page-faq .faq-accordion__question {
  flex: 1;
}

.page-faq .faq-accordion__arrow {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  color: var(--faq-neutral);
  transition: transform var(--faq-transition);
}

.page-faq .faq-accordion__item[data-open] .faq-accordion__arrow {
  transform: rotate(180deg);
}

.page-faq .faq-accordion__answer {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.4s ease, opacity 0.4s ease, padding 0.4s ease;
  padding: 0 1.25rem 0 3.75rem;
}

.page-faq .faq-accordion__item[data-open] .faq-accordion__answer {
  max-height: 600px;
  opacity: 1;
  padding: 0 1.25rem 1.125rem 3.75rem;
}

.page-faq .faq-accordion__answer p {
  margin: 0 0 0.75rem;
  font-size: 0.925rem;
  line-height: 1.7;
  color: var(--faq-neutral);
}

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

.page-faq .faq-accordion__answer a {
  color: var(--faq-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-faq .faq-accordion__answer a:hover {
  color: var(--faq-accent);
}

/* ===== 手风琴内图片 ===== */
.page-faq .faq-image {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--faq-radius-sm, 8px);
  margin-top: 0.75rem;
  object-fit: cover;
}

/* ===== 技术支持卡片 ===== */
.page-faq .faq-support-card {
  background: var(--faq-card-bg);
  border-radius: var(--faq-radius-lg);
  box-shadow: var(--shadow-card, 0 2px 12px rgba(26,92,255,0.08));
  overflow: hidden;
  position: relative;
}

.page-faq .faq-support-card__bg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 140px;
  object-fit: cover;
  background: linear-gradient(135deg, #1A5CFF, #FF6B35);
}

.page-faq .faq-support-card__info {
  padding: 1.5rem;
}

.page-faq .faq-support-card__text {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--faq-neutral);
  margin: 0 0 1rem;
}

.page-faq .faq-support-card__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.page-faq .faq-support-card__list li {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.page-faq .faq-support-card__label {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--faq-text);
  min-width: 5rem;
}

.page-faq .faq-support-card__link {
  color: var(--faq-primary);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color var(--faq-transition);
}

.page-faq .faq-support-card__link:hover,
.page-faq .faq-support-card__link:focus-visible {
  color: var(--faq-accent);
  text-decoration: underline;
  outline: none;
}

.page-faq .faq-support-card__note {
  font-size: 0.825rem;
  color: #888;
  margin: 1rem 0 0;
  font-style: italic;
}

/* ===== 更多帮助 ===== */
.page-faq .faq-more-help {
  text-align: center;
  padding: 2rem 1rem;
  border-top: 1px solid var(--faq-border-light);
  margin-top: 0.5rem;
}

.page-faq .faq-more-help__text {
  font-size: 0.95rem;
  color: var(--faq-neutral);
  margin: 0;
}

.page-faq .faq-more-help__text a {
  color: var(--faq-primary);
  text-decoration: underline;
  font-weight: 600;
}

.page-faq .faq-more-help__text a:hover {
  color: var(--faq-accent);
}

/* ===== 桌面端自适应 ===== */
@media (min-width: 768px) {
  .page-faq .faq-hero {
    padding: 3.5rem 2.5rem 4rem;
  }

  .page-faq .faq-hero__title {
    font-size: 2.5rem;
  }

  .page-faq .faq-hero__subtitle {
    font-size: 1.1rem;
  }

  .page-faq .faq-layout {
    flex-direction: row;
    gap: 2.5rem;
  }

  .page-faq .faq-layout__nav {
    width: 260px;
    flex-shrink: 0;
  }

  .page-faq .faq-section .chapter__number {
    font-size: 2.5rem;
  }

  .page-faq .faq-section .chapter__title {
    font-size: 1.625rem;
  }

  .page-faq .faq-accordion__trigger {
    padding: 1.125rem 1.5rem;
    font-size: 1rem;
  }

  .page-faq .faq-accordion__answer {
    padding: 0 1.5rem 0 4rem;
  }

  .page-faq .faq-accordion__item[data-open] .faq-accordion__answer {
    padding: 0 1.5rem 1.25rem 4rem;
  }

  .page-faq .faq-support-card__info {
    padding: 2rem 2.5rem;
  }

  .page-faq .faq-support-card__bg {
    max-height: 180px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout__nav {
    width: 280px;
  }
}

/* ===== 宽屏最大化 ===== */
@media (min-width: 1280px) {
  .page-faq .faq-hero {
    padding: 4rem 3rem 4.5rem;
  }
}

/* ===== 缩减动效 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-accordion__answer {
    transition: none;
  }

  .page-faq .faq-accordion__icon,
  .page-faq .faq-accordion__arrow {
    transition: none;
  }

  .page-faq .faq-accordion__trigger {
    transition: none;
  }

  .page-faq .faq-accordion__item {
    transition: none;
  }
}

.page-faq {
  --faq-radius-sm: var(--faq-radius);
}