.page-faq {
  --faq-accent: #FF6B35;
  --faq-bg-node: #1A2332;
  --faq-bg-step: #0B0E14;
  --faq-border-node: rgba(255, 107, 53, 0.25);
  --faq-border-step: rgba(140, 158, 171, 0.2);
  --faq-text-dim: #B0B8C4;
  --faq-shadow-card: 0 8px 24px rgba(0,0,0,0.35), 0 2px 6px rgba(0,0,0,0.2);
  --faq-shadow-hover: 0 14px 40px rgba(0,0,0,0.5), 0 4px 12px rgba(0,0,0,0.3);
  --faq-radius: 6px;
  --faq-transition: 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);

  display: block;
  background: #0B0E14;
  color: #FFFFFF;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  padding-bottom: 80px;
}

/* 面包屑 */
.page-faq__breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 24px;
  font-size: 13px;
  letter-spacing: 0.3px;
  color: var(--faq-text-dim);
}
.page-faq__breadcrumb-link {
  color: var(--faq-text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--faq-transition), color var(--faq-transition);
}
.page-faq__breadcrumb-link:hover {
  color: var(--faq-accent);
  border-bottom-color: var(--faq-accent);
}
.page-faq__breadcrumb-sep {
  color: var(--faq-accent);
  font-weight: 700;
}
.page-faq__breadcrumb-current {
  color: #FFFFFF;
  font-weight: 600;
}

/* 首屏 */
.page-faq__hero {
  padding: 32px 0 40px;
}
.page-faq__hero-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 20px;
}
.page-faq__hero-text {
  flex: 1;
}
.page-faq__title {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 12px;
  letter-spacing: -0.5px;
  color: #FFFFFF;
  position: relative;
  display: inline-block;
}
.page-faq__title::after {
  content: "";
  display: block;
  width: 60px;
  height: 4px;
  background: var(--faq-accent);
  margin-top: 8px;
  border-radius: 2px;
}
.page-faq__subtitle {
  font-size: 1rem;
  color: var(--faq-text-dim);
  line-height: 1.6;
  max-width: 520px;
  margin: 0;
}
.page-faq__hero-visual {
  flex-shrink: 0;
  border: 2px solid rgba(255, 107, 53, 0.2);
  border-radius: var(--faq-radius);
  overflow: hidden;
  box-shadow: var(--faq-shadow-card);
  background: var(--faq-bg-node);
}
.page-faq__hero-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* 进度条 */
.page-faq__progress {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 0 24px;
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
  width: 100%;
  box-sizing: border-box;
}
.page-faq__progress-track {
  flex: 1;
  height: 6px;
  background: rgba(140, 158, 171, 0.15);
  border-radius: 3px;
  overflow: hidden;
}
.page-faq__progress-fill {
  height: 100%;
  background: var(--faq-accent);
  border-radius: 3px;
  transition: width 0.4s ease;
}
.page-faq__progress-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--faq-text-dim);
  white-space: nowrap;
  letter-spacing: 0.5px;
}

/* 技能树节点 */
.page-faq__tree {
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  padding-left: 8px;
  padding-right: 8px;
  max-width: 800px;
  margin: 0 auto 40px;
}
.page-faq__node {
  background: var(--faq-bg-node);
  border: 2px solid var(--faq-border-node);
  border-radius: var(--faq-radius);
  box-shadow: var(--faq-shadow-card);
  transition: border-color var(--faq-transition), box-shadow var(--faq-transition);
}
.page-faq__node:hover {
  border-color: var(--faq-accent);
  box-shadow: var(--faq-shadow-hover);
}
.page-faq__node-header {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 18px 24px;
  background: transparent;
  border: none;
  color: #FFFFFF;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.15rem;
  font-weight: 700;
  cursor: pointer;
  text-align: left;
  transition: background var(--faq-transition);
  position: relative;
}
.page-faq__node-header:hover {
  background: rgba(255, 107, 53, 0.05);
}
.page-faq__node-header:focus-visible {
  outline: 2px solid var(--faq-accent);
  outline-offset: -2px;
  border-radius: var(--faq-radius);
}
.page-faq__node-number {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--faq-accent);
  line-height: 1;
  min-width: 36px;
}
.page-faq__node-title {
  flex: 1;
  letter-spacing: -0.2px;
}
.page-faq__node-icon {
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--faq-accent);
  transition: transform var(--faq-transition);
  line-height: 1;
}
.page-faq__node[data-expanded="true"] .page-faq__node-icon {
  transform: rotate(45deg);
}

/* 节点展开内容 */
.page-faq__node-body {
  padding: 0 24px 24px;
  border-top: 1px solid rgba(255, 107, 53, 0.1);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.page-faq__node[data-expanded="true"] .page-faq__node-body {
  padding-top: 20px;
}

/* 步骤卡片 */
.page-faq__step-card {
  background: var(--faq-bg-step);
  border: 1px solid var(--faq-border-step);
  border-left: 4px solid var(--faq-accent);
  border-radius: 4px;
  padding: 14px 18px;
  transition: border-color var(--faq-transition), box-shadow var(--faq-transition);
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}
.page-faq__step-card:hover {
  border-color: var(--faq-accent);
  border-left-width: 6px;
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.12);
}
.page-faq__step-num {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--faq-accent);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.page-faq__step-desc {
  font-size: 0.95rem;
  line-height: 1.6;
  color: #E8ECF0;
  margin: 0;
}
.page-faq__step-desc strong {
  color: #FFFFFF;
  font-weight: 600;
  background: rgba(255, 107, 53, 0.12);
  padding: 0 4px;
  border-radius: 2px;
}
.page-faq__step-desc kbd {
  background: rgba(140, 158, 171, 0.12);
  border: 1px solid rgba(140, 158, 171, 0.25);
  border-radius: 3px;
  padding: 1px 6px;
  font-family: monospace;
  font-size: 0.85em;
  color: #FFFFFF;
}
.page-faq__step-image {
  margin: 8px 0 4px;
  border: 1px solid rgba(140, 158, 171, 0.15);
  border-radius: 4px;
  overflow: hidden;
  max-width: 400px;
}
.page-faq__step-image img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-faq__node-feedback {
  font-size: 0.85rem;
  color: var(--faq-text-dim);
  margin: 4px 0 0;
  padding-top: 12px;
  border-top: 1px solid rgba(140, 158, 171, 0.08);
}
.page-faq__feedback-link,
.page-faq__inline-link {
  color: var(--faq-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  font-weight: 500;
  transition: border-color var(--faq-transition);
}
.page-faq__feedback-link:hover,
.page-faq__inline-link:hover {
  border-bottom-color: var(--faq-accent);
}

/* 连线装饰（绝对定位在树旁） */
.page-faq__connector {
  display: none;
}

/* 快速通道 */
.page-faq__quick-links {
  padding-top: 16px;
  padding-bottom: 0;
}
.page-faq__quick-title {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: #FFFFFF;
  margin: 0 0 20px;
  position: relative;
  display: inline-block;
}
.page-faq__quick-title::after {
  content: "";
  display: block;
  width: 36px;
  height: 3px;
  background: var(--faq-accent);
  margin-top: 6px;
  border-radius: 2px;
}
.page-faq__quick-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.page-faq__quick-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 20px;
  background: var(--faq-bg-node);
  border: 2px solid rgba(140, 158, 171, 0.12);
  border-radius: var(--faq-radius);
  text-decoration: none;
  color: #FFFFFF;
  font-weight: 500;
  font-size: 0.95rem;
  transition: border-color var(--faq-transition), box-shadow var(--faq-transition), transform var(--faq-transition);
  box-shadow: var(--faq-shadow-card);
}
.page-faq__quick-card:hover {
  border-color: var(--faq-accent);
  box-shadow: var(--faq-shadow-hover);
  transform: translateY(-2px);
}
.page-faq__quick-icon {
  font-size: 1.3rem;
  line-height: 1;
}
.page-faq__quick-label {
  line-height: 1.3;
}

/* ====== 窄屏（移动端优先基础样式已在上方） ====== */
@media (max-width: 599px) {
  .page-faq__hero {
    padding: 20px 0 28px;
  }
  .page-faq__title {
    font-size: 1.8rem;
  }
  .page-faq__subtitle {
    font-size: 0.9rem;
  }
  .page-faq__hero-visual {
    max-height: 180px;
  }
  .page-faq__hero-img {
    height: 180px;
    object-fit: cover;
  }
  .page-faq__node-header {
    padding: 14px 16px;
    font-size: 1rem;
    gap: 12px;
  }
  .page-faq__node-number {
    font-size: 1.2rem;
    min-width: 28px;
  }
  .page-faq__node-body {
    padding: 0 16px 18px;
  }
  .page-faq__node[data-expanded="true"] .page-faq__node-body {
    padding-top: 14px;
  }
  .page-faq__step-card {
    padding: 12px 14px;
  }
  .page-faq__step-desc {
    font-size: 0.88rem;
  }
  .page-faq__quick-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .page-faq__quick-card {
    padding: 14px 16px;
    font-size: 0.88rem;
  }
  .page-faq__progress {
    padding-left: 16px;
    padding-right: 16px;
    gap: 10px;
  }
  .page-faq__progress-label {
    font-size: 11px;
  }
  .page-faq__breadcrumb {
    font-size: 12px;
    padding-top: 16px;
  }
  .page-faq__tree {
    padding-left: 4px;
    padding-right: 4px;
    gap: 12px;
  }
}

/* ====== 桌面端 ====== */
@media (min-width: 600px) {
  .page-faq__hero-content {
    flex-direction: row;
    align-items: center;
  }
  .page-faq__hero-text {
    flex: 1;
  }
  .page-faq__hero-visual {
    flex: 0 0 380px;
    max-width: 380px;
  }
  .page-faq__title {
    font-size: 3rem;
  }
  .page-faq__subtitle {
    font-size: 1.05rem;
  }
  .page-faq__tree {
    padding-left: 0;
    padding-right: 0;
    gap: 20px;
  }
  .page-faq__node-header {
    padding: 20px 32px;
    font-size: 1.25rem;
  }
  .page-faq__node-number {
    font-size: 1.8rem;
    min-width: 44px;
  }
  .page-faq__node-body {
    padding: 0 32px 28px;
  }
  .page-faq__node[data-expanded="true"] .page-faq__node-body {
    padding-top: 24px;
  }
  .page-faq__quick-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
  .page-faq__progress {
    padding-left: 32px;
    padding-right: 32px;
  }
}

@media (min-width: 900px) {
  .page-faq__hero-visual {
    flex: 0 0 480px;
    max-width: 480px;
  }
  .page-faq__title {
    font-size: 3.6rem;
  }
  .page-faq__tree {
    padding-left: 16px;
    padding-right: 16px;
  }
  /* 连线装饰在桌面显示 */
  .page-faq__connector {
    display: block;
    position: absolute;
    left: 50%;
    top: 240px;
    width: 2px;
    height: 180px;
    transform: translateX(-50%);
    pointer-events: none;
    z-index: 0;
  }
  .page-faq__connector-svg {
    display: block;
    width: 100%;
    height: 100%;
  }
}

/* ====== 宽屏内容限制 ====== */
@media (min-width: 1200px) {
  .page-faq .container {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 24px;
    padding-right: 24px;
  }
  .page-faq__hero-content {
    gap: 48px;
  }
  .page-faq__hero-visual {
    flex: 0 0 520px;
    max-width: 520px;
  }
}