/* ===== 帮助中心 (page-faq) 专属样式 ===== */
.page-faq {
  --faq-accent: var(--color-primary);
  --faq-gold: var(--color-accent);
  --faq-card-bg: var(--color-bg-card);
  --faq-card-border: var(--color-border);
  --faq-card-radius: 0;
  --faq-divider-thick: 4px;
  --faq-gap: 1.5rem;
  --faq-step-num-size: 2.8rem;
  --faq-img-radius: 0;
}

/* ---- 移动端优先 (基础样式) ---- */
.page-faq .container {
  max-width: var(--max-width, 1280px);
  margin: 0 auto;
  padding: 1.2rem 1rem 3rem;
}

/* 面包屑 */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.6rem;
  font-size: var(--scale-small, 0.875rem);
  color: var(--color-text-secondary, #B0B0B0);
  margin-bottom: 1.2rem;
}

.page-faq .breadcrumb a {
  color: var(--color-secondary, #00BFFF);
  text-decoration: none;
  transition: color var(--transition-fast, 0.15s ease);
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--color-primary, #FF4500);
  text-decoration: underline;
}

.page-faq .breadcrumb .sep {
  color: var(--color-text-secondary, #B0B0B0);
  user-select: none;
}

/* 英雄区 */
.page-faq .faq-hero {
  margin-bottom: 1.8rem;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-heading, 'Impact','Arial Black',sans-serif);
  font-weight: var(--weight-heading, 900);
  font-size: var(--scale-h1, 2.2rem);
  text-transform: uppercase;
  color: var(--color-text-primary, #FFFFFF);
  line-height: 1.1;
  margin: 0 0 0.5rem;
  letter-spacing: 0.02em;
  position: relative;
  display: inline-block;
}

.page-faq .faq-hero h1::after {
  content: '';
  display: block;
  width: 60px;
  height: var(--faq-divider-thick, 4px);
  background: var(--faq-accent, #FF4500);
  margin-top: 0.4rem;
}

.page-faq .faq-hero .text-body {
  color: var(--color-text-secondary, #B0B0B0);
  font-size: var(--scale-body, 1rem);
  max-width: 560px;
  margin: 0.6rem 0 0;
}

/* 搜索框 */
.page-faq .faq-search {
  position: relative;
  max-width: 500px;
  margin-bottom: 2.2rem;
}

.page-faq .faq-search input {
  display: block;
  width: 100%;
  padding: 0.85rem 1rem 0.85rem 3rem;
  font-family: var(--font-body, 'Helvetica Neue',Arial,sans-serif);
  font-size: var(--scale-body, 1rem);
  color: var(--color-text-primary, #FFFFFF);
  background: var(--faq-card-bg, #1A1A1A);
  border: 2px solid var(--faq-card-border, #333);
  border-radius: 0;
  outline: none;
  transition: border-color var(--transition-base, 0.25s ease), box-shadow var(--transition-base, 0.25s ease);
  box-sizing: border-box;
}

.page-faq .faq-search input::placeholder {
  color: var(--color-text-secondary, #B0B0B0);
  opacity: 0.8;
}

.page-faq .faq-search input:focus {
  border-color: var(--faq-accent, #FF4500);
  box-shadow: 0 0 0 3px rgba(255, 69, 0, 0.2);
}

.page-faq .faq-search-icon {
  position: absolute;
  left: 0.8rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  line-height: 1;
  color: var(--color-text-secondary, #B0B0B0);
  pointer-events: none;
}

/* ---- 通用章节样式 ---- */
.page-faq .faq-section {
  margin-bottom: 2.8rem;
}

.page-faq .faq-section h2 {
  font-family: var(--font-heading, 'Impact','Arial Black',sans-serif);
  font-weight: var(--weight-heading, 900);
  font-size: var(--scale-h2, 1.6rem);
  text-transform: uppercase;
  color: var(--color-text-primary, #FFFFFF);
  margin: 0 0 0.3rem;
  letter-spacing: 0.01em;
}

.page-faq .section-desc {
  color: var(--color-text-secondary, #B0B0B0);
  margin: 0 0 1.6rem;
  max-width: 540px;
}

/* 分隔线 */
.page-faq .section-divider {
  border: none;
  height: var(--faq-divider-thick, 4px);
  background: var(--faq-card-border, #333);
  margin: 2.2rem 0 2.6rem;
  opacity: 0.5;
}

/* ---- 快速入门：步骤网格 ---- */
.page-faq .step-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap, 1.5rem);
  margin-bottom: 2rem;
}

.page-faq .step-card {
  background: var(--faq-card-bg, #1A1A1A);
  border: 2px solid var(--faq-card-border, #333);
  padding: 1.4rem 1.2rem 1.2rem;
  position: relative;
  transition: border-color var(--transition-base, 0.25s ease), transform var(--transition-base, 0.25s ease);
}

.page-faq .step-card:hover {
  border-color: var(--faq-accent, #FF4500);
  transform: translateX(4px);
}

.page-faq .step-number {
  display: inline-block;
  font-family: var(--font-numeric, 'Courier New', monospace);
  font-size: var(--faq-step-num-size, 2.8rem);
  font-weight: 700;
  color: var(--faq-gold, #FFD700);
  line-height: 1;
  margin-bottom: 0.4rem;
  letter-spacing: 0.05em;
}

.page-faq .step-card h3 {
  font-family: var(--font-heading, 'Impact','Arial Black',sans-serif);
  font-weight: 700;
  font-size: var(--scale-h3, 1.25rem);
  text-transform: uppercase;
  color: var(--color-text-primary, #FFFFFF);
  margin: 0.2rem 0 0.4rem;
}

.page-faq .step-card p {
  font-family: var(--font-body, 'Helvetica Neue',Arial,sans-serif);
  font-size: var(--scale-body, 1rem);
  color: var(--color-text-secondary, #B0B0B0);
  line-height: 1.6;
  margin: 0;
}

/* ---- 图片容器 ---- */
.page-faq .faq-figure {
  margin: 1.8rem 0 0;
  padding: 0;
  max-width: 100%;
}

.page-faq .faq-img {
  display: block;
  width: 100%;
  max-width: 600px;
  height: auto;
  object-fit: cover;
  border: 2px solid var(--faq-card-border, #333);
  background: var(--faq-card-bg, #1A1A1A);
}

.page-faq .faq-figure figcaption {
  color: var(--color-text-secondary, #B0B0B0);
  margin-top: 0.5rem;
  font-style: italic;
}

/* ---- 功能详解：卡片网格 ---- */
.page-faq .feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap, 1.5rem);
  margin-bottom: 2rem;
}

.page-faq .feature-card {
  background: var(--faq-card-bg, #1A1A1A);
  border: 2px solid var(--faq-card-border, #333);
  border-left: var(--faq-divider-thick, 4px) solid var(--faq-accent, #FF4500);
  padding: 1.4rem 1.2rem 1.6rem;
  transition: border-color var(--transition-base, 0.25s ease), box-shadow var(--transition-base, 0.25s ease);
}

.page-faq .feature-card:hover {
  border-color: var(--faq-accent, #FF4500);
  box-shadow: var(--shadow-glow, 0 0 20px rgba(255, 69, 0, 0.3));
}

.page-faq .feature-card h3 {
  font-family: var(--font-heading, 'Impact','Arial Black',sans-serif);
  font-weight: 700;
  font-size: var(--scale-h3, 1.25rem);
  text-transform: uppercase;
  color: var(--color-text-primary, #FFFFFF);
  margin: 0 0 0.5rem;
}

.page-faq .feature-card p {
  font-family: var(--font-body, 'Helvetica Neue',Arial,sans-serif);
  font-size: var(--scale-body, 1rem);
  color: var(--color-text-secondary, #B0B0B0);
  line-height: 1.6;
  margin: 0 0 1rem;
}

.page-faq .feature-card .btn-outline {
  display: inline-block;
  font-family: var(--font-body, 'Helvetica Neue',Arial,sans-serif);
  font-size: var(--scale-small, 0.875rem);
  font-weight: 600;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.5rem 1rem;
  border: 2px solid var(--faq-accent, #FF4500);
  color: var(--faq-accent, #FF4500);
  background: transparent;
  transition: background var(--transition-fast, 0.15s ease), color var(--transition-fast, 0.15s ease);
  letter-spacing: 0.04em;
}

.page-faq .feature-card .btn-outline:hover,
.page-faq .feature-card .btn-outline:focus-visible {
  background: var(--faq-accent, #FF4500);
  color: var(--color-text-on-color, #000000);
}

/* ---- 常见问题：折叠卡片 ---- */
.page-faq .faq-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem;
}

.page-faq .faq-item {
  background: var(--faq-card-bg, #1A1A1A);
  border: 2px solid var(--faq-card-border, #333);
  transition: border-color var(--transition-base, 0.25s ease), background var(--transition-base, 0.25s ease);
}

.page-faq .faq-item[open] {
  border-color: var(--faq-accent, #FF4500);
  background: #222;
}

.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.2rem;
  cursor: pointer;
  font-family: var(--font-body, 'Helvetica Neue',Arial,sans-serif);
  font-size: var(--scale-body, 1rem);
  font-weight: 600;
  color: var(--color-text-primary, #FFFFFF);
  line-height: 1.4;
  list-style: none;
  transition: color var(--transition-fast, 0.15s ease);
  user-select: none;
}

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

.page-faq .faq-item summary::after {
  content: '+';
  margin-left: auto;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--faq-accent, #FF4500);
  line-height: 1;
  transition: transform var(--transition-base, 0.25s ease);
  flex-shrink: 0;
}

.page-faq .faq-item[open] summary::after {
  content: '−';
  transform: rotate(180deg);
}

.page-faq .faq-item summary:hover,
.page-faq .faq-item[open] summary {
  color: var(--faq-accent, #FF4500);
}

.page-faq .faq-q-num {
  font-family: var(--font-numeric, 'Courier New', monospace);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--faq-gold, #FFD700);
  min-width: 1.8rem;
  flex-shrink: 0;
}

.page-faq .faq-answer {
  padding: 0 1.2rem 1.2rem 4rem;
  font-family: var(--font-body, 'Helvetica Neue',Arial,sans-serif);
  font-size: var(--scale-body, 1rem);
  color: var(--color-text-secondary, #B0B0B0);
  line-height: 1.7;
  border-top: 1px solid var(--faq-card-border, #333);
  margin-top: 0;
}

.page-faq .faq-answer a {
  color: var(--color-secondary, #00BFFF);
  text-decoration: underline;
  transition: color var(--transition-fast, 0.15s ease);
}

.page-faq .faq-answer a:hover,
.page-faq .faq-answer a:focus-visible {
  color: var(--faq-accent, #FF4500);
}

/* ---- 窄屏额外优化 ---- */
@media (max-width: 479px) {
  .page-faq .container {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }

  .page-faq .faq-hero h1 {
    font-size: calc(var(--scale-h1, 2.2rem) * 0.9);
  }

  .page-faq .step-card {
    padding: 1rem 0.9rem;
  }

  .page-faq .feature-card {
    padding: 1rem 0.9rem 1.2rem;
  }

  .page-faq .faq-item summary {
    padding: 0.85rem 0.9rem;
    font-size: 0.95rem;
  }

  .page-faq .faq-answer {
    padding-left: 0.9rem;
    padding-right: 0.9rem;
  }

  .page-faq .faq-q-num {
    min-width: 1.4rem;
    font-size: 1rem;
  }
}

/* ---- 桌面端增强 ---- */
@media (min-width: 768px) {
  .page-faq .container {
    padding: 2rem 2rem 4rem;
  }

  .page-faq .faq-hero h1 {
    font-size: var(--scale-h1, 3rem);
  }

  .page-faq .faq-hero h1::after {
    width: 80px;
  }

  .page-faq .step-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-faq .step-card {
    padding: 1.6rem 1.4rem 1.4rem;
  }

  .page-faq .step-card:hover {
    transform: translateY(-4px);
  }

  .page-faq .feature-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-faq .feature-card {
    padding: 1.6rem 1.4rem 1.8rem;
  }

  .page-faq .faq-list {
    gap: 0.8rem;
  }

  .page-faq .faq-item summary {
    padding: 1.1rem 1.6rem;
    font-size: 1.05rem;
  }

  .page-faq .faq-answer {
    padding: 0 1.6rem 1.4rem 4.4rem;
  }

  .page-faq .faq-figure {
    margin-top: 2.2rem;
  }

  .page-faq .faq-img {
    max-width: 600px;
  }
}

@media (min-width: 1024px) {
  .page-faq .container {
    padding: 2.5rem 3rem 5rem;
  }

  .page-faq .faq-hero h1 {
    font-size: var(--scale-h1, 3rem);
  }

  .page-faq .faq-search {
    max-width: 520px;
  }

  .page-faq .feature-grid {
    gap: 2rem;
  }

  .page-faq .step-grid {
    gap: 2rem;
  }
}