.page-faq {
  --faq-nav-w: 200px;
  --faq-hero-h: 220px;
  --faq-transition: 0.35s ease;
  --faq-radius: 6px;
  color: var(--color-neutral-dark);
  font-family: "Noto Sans SC", system-ui, sans-serif;
  font-weight: var(--font-body-weight);
  line-height: 1.6;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.75rem 1rem;
  font-size: 0.8125rem;
  background: var(--color-neutral-light);
  border-bottom: 2px solid var(--color-accent);
  max-width: var(--container-max);
  margin: 0 auto;
}
.page-faq .breadcrumb-link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-fast);
}
.page-faq .breadcrumb-link:hover {
  color: var(--color-secondary);
}
.page-faq .breadcrumb-sep {
  color: var(--color-neutral-dark);
  font-weight: 700;
  margin: 0 0.125rem;
}
.page-faq .breadcrumb-current {
  color: var(--color-neutral-dark);
  font-weight: 400;
}

/* ---------- 首屏 错位色块 ---------- */
.page-faq .faq-hero {
  position: relative;
  max-width: var(--container-max);
  margin: 0 auto 1.5rem;
  height: var(--faq-hero-h);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.page-faq .faq-hero-slant {
  position: absolute;
  inset: 0;
  background: var(--gradient-primary);
  clip-path: polygon(0 0, 100% 0, 85% 100%, 0 85%);
  z-index: 0;
}
.page-faq .faq-hero-accent {
  position: absolute;
  top: 0;
  right: 0;
  width: 140px;
  height: 140px;
  background: var(--color-secondary);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
  z-index: 1;
  opacity: 0.85;
}
.page-faq .faq-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 1.5rem 2rem;
}
.page-faq .faq-hero-title {
  font-size: 2.25rem;
  font-weight: var(--font-head-weight);
  color: var(--color-white);
  margin: 0 0 0.25rem;
  letter-spacing: 0.02em;
  text-shadow: 0 2px 8px rgba(0,0,0,0.25);
}
.page-faq .faq-hero-desc {
  font-size: 1rem;
  color: rgba(255,255,255,0.9);
  margin: 0;
  font-weight: 400;
}

/* ---------- 主体 左右分屏 ---------- */
.page-faq .faq-main {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1rem 2rem;
}
.page-faq .faq-radio {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}
.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* ----- 左屏 分类导航 ----- */
.page-faq .faq-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
}
.page-faq .faq-nav-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  background: var(--color-neutral-light);
  color: var(--color-neutral-dark);
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: var(--faq-radius);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 50%, calc(100% - 8px) 100%, 0 100%, 8px 50%);
  border: none;
  user-select: none;
}
.page-faq .faq-nav-item:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}
.page-faq .faq-nav-icon {
  font-size: 1.125rem;
  line-height: 1;
}
.page-faq .faq-nav-label {
  white-space: nowrap;
}

/* 选中态 */
#faq-cat-login:checked ~ .faq-layout .faq-nav label[for="faq-cat-login"],
#faq-cat-features:checked ~ .faq-layout .faq-nav label[for="faq-cat-features"],
#faq-cat-tech:checked ~ .faq-layout .faq-nav label[for="faq-cat-tech"],
#faq-cat-contact:checked ~ .faq-layout .faq-nav label[for="faq-cat-contact"] {
  background: var(--color-secondary);
  color: var(--color-white);
  transform: scale(1.04);
  box-shadow: 0 4px 14px rgba(255,102,0,0.35);
}

/* ----- 右屏 答案内容 ----- */
.page-faq .faq-content {
  flex: 1;
  min-height: 320px;
  position: relative;
}
.page-faq .faq-panel {
  display: none;
  animation: faq-fade-in 0.4s ease both;
}
#faq-cat-login:checked ~ .faq-layout .faq-content #panel-login,
#faq-cat-features:checked ~ .faq-layout .faq-content #panel-features,
#faq-cat-tech:checked ~ .faq-layout .faq-content #panel-tech,
#faq-cat-contact:checked ~ .faq-layout .faq-content #panel-contact {
  display: block;
}
@keyframes faq-fade-in {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.page-faq .panel-title {
  font-size: 1.375rem;
  font-weight: var(--font-head-weight);
  color: var(--color-primary);
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--color-accent);
}

/* details / summary */
.page-faq .faq-item {
  margin-bottom: 0.75rem;
  border: 1px solid #e0e0e0;
  border-radius: var(--faq-radius);
  background: var(--color-white);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
}
.page-faq .faq-item:hover {
  box-shadow: 0 6px 20px rgba(0,0,0,0.10);
}
.page-faq .faq-item[open] {
  border-color: var(--color-accent);
}
.page-faq .faq-question {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1rem;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  background: var(--color-neutral-light);
  list-style: none;
  transition: background var(--transition-fast);
  position: relative;
}
.page-faq .faq-question::-webkit-details-marker {
  display: none;
}
.page-faq .faq-question::marker {
  display: none;
  content: "";
}
.page-faq .faq-question::before {
  content: "▶";
  display: inline-block;
  font-size: 0.75rem;
  color: var(--color-primary);
  transition: transform var(--transition-fast);
  margin-right: 0.5rem;
}
.page-faq .faq-item[open] > .faq-question::before {
  transform: rotate(90deg);
  color: var(--color-secondary);
}
.page-faq .faq-item[open] > .faq-question {
  background: var(--color-primary);
  color: var(--color-white);
}
.page-faq .faq-item[open] > .faq-question::before {
  color: var(--color-white);
}
.page-faq .faq-answer {
  padding: 1rem 1rem 1.25rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: #333;
  border-top: 2px solid var(--color-accent);
}
.page-faq .faq-answer p {
  margin: 0 0 0.75rem;
}
.page-faq .faq-answer-img {
  margin: 0.75rem 0;
  max-width: 100%;
  border-radius: var(--faq-radius);
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
}
.page-faq .faq-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ----- 有帮助吗 反馈组件 ----- */
.page-faq .feedback-wrap {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px dashed #ccc;
}
.page-faq .feedback-label {
  font-size: 0.8125rem;
  color: #666;
  font-weight: 600;
  margin-right: 0.25rem;
}
.page-faq .feedback-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}
.page-faq .feedback-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.3125rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  border: 1.5px solid #ccc;
  border-radius: 20px;
  background: var(--color-white);
  color: #555;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
  user-select: none;
}
.page-faq .feedback-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-neutral-dark);
  transform: scale(1.04);
}
.page-faq .feedback-input:checked + .feedback-btn {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-neutral-dark);
  transform: scale(1.05);
  box-shadow: 0 2px 8px rgba(0,255,136,0.35);
}
.page-faq .feedback-thanks {
  display: none;
  font-size: 0.8125rem;
  color: var(--color-primary);
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  background: #e8f5e9;
  border-radius: 16px;
}
.page-faq .feedback-input:checked ~ .feedback-thanks {
  display: inline-block;
}

/* ----- 联系客服 卡片 ----- */
.page-faq .contact-card {
  background: var(--color-neutral-light);
  border-radius: var(--faq-radius);
  padding: 1.5rem;
  border-left: 4px solid var(--color-secondary);
  box-shadow: var(--shadow-card);
}
.page-faq .contact-intro {
  font-size: 1rem;
  margin: 0 0 1.25rem;
  color: var(--color-neutral-dark);
}
.page-faq .contact-list {
  display: grid;
  gap: 0.875rem;
}
.page-faq .contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9375rem;
}
.page-faq .contact-icon {
  font-size: 1.25rem;
  line-height: 1.4;
  flex-shrink: 0;
}
.page-faq .contact-item strong {
  display: block;
  font-weight: 700;
  color: var(--color-primary);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.125rem;
}
.page-faq .contact-email {
  color: var(--color-primary);
  text-decoration: underline;
  font-weight: 600;
  word-break: break-all;
}
.page-faq .contact-phone {
  font-weight: 700;
  color: var(--color-neutral-dark);
  letter-spacing: 0.02em;
}
.page-faq .contact-note {
  margin: 1.25rem 0 0;
  font-size: 0.8125rem;
  color: #888;
  border-top: 1px solid #ddd;
  padding-top: 0.75rem;
}

/* ----- 更多帮助 内链卡片 ----- */
.page-faq .faq-links {
  max-width: var(--container-max);
  margin: 2rem auto 3rem;
  padding: 0 1rem;
}
.page-faq .faq-links-title {
  font-size: 1.25rem;
  font-weight: var(--font-head-weight);
  color: var(--color-primary);
  margin: 0 0 1rem;
  text-align: center;
}
.page-faq .faq-links-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}
.page-faq .faq-link-card {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.875rem 1.5rem;
  background: var(--color-white);
  border: 1.5px solid #e0e0e0;
  border-radius: var(--faq-radius);
  text-decoration: none;
  color: var(--color-neutral-dark);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-card);
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 50%, calc(100% - 6px) 100%, 0 100%, 6px 50%);
}
.page-faq .faq-link-card:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 24px rgba(255,102,0,0.15);
}
.page-faq .faq-link-icon {
  font-size: 1.25rem;
  line-height: 1;
}

/* ========== 桌面 >= 768px ========== */
@media (min-width: 768px) {
  .page-faq .breadcrumb {
    padding: 0.75rem 2rem;
  }
  .page-faq .faq-hero {
    --faq-hero-h: 260px;
    margin-bottom: 2rem;
  }
  .page-faq .faq-hero-title {
    font-size: 3rem;
  }
  .page-faq .faq-hero-desc {
    font-size: 1.125rem;
  }
  .page-faq .faq-hero-accent {
    width: 180px;
    height: 180px;
  }
  .page-faq .faq-main {
    padding: 0 2rem 2.5rem;
  }
  .page-faq .faq-layout {
    flex-direction: row;
    gap: 2rem;
  }
  .page-faq .faq-nav {
    flex: 0 0 var(--faq-nav-w);
    flex-direction: column;
    gap: 0.75rem;
    position: sticky;
    top: calc(var(--header-total) + 0.5rem);
    align-self: flex-start;
  }
  .page-faq .faq-nav-item {
    width: 100%;
    justify-content: flex-start;
    padding: 0.75rem 1.25rem;
    font-size: 1rem;
    clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 50%, calc(100% - 10px) 100%, 0 100%, 10px 50%);
  }
  .page-faq .faq-content {
    flex: 1;
    min-width: 0;
  }
  .page-faq .panel-title {
    font-size: 1.5rem;
  }
  .page-faq .faq-question {
    padding: 1rem 1.25rem;
    font-size: 1.0625rem;
  }
  .page-faq .faq-answer {
    padding: 1.25rem 1.5rem 1.5rem;
    font-size: 1rem;
  }
  .page-faq .faq-answer-img {
    max-width: 420px;
  }
  .page-faq .contact-list {
    grid-template-columns: 1fr 1fr;
  }
  .page-faq .faq-links {
    margin-top: 3rem;
  }
  .page-faq .faq-links-grid {
    gap: 1.5rem;
  }
  .page-faq .faq-link-card {
    padding: 1rem 2rem;
    font-size: 1rem;
  }
}

/* ========== 桌面 >= 1024px 微调 ========== */
@media (min-width: 1024px) {
  .page-faq .faq-hero {
    --faq-hero-h: 300px;
  }
  .page-faq .faq-hero-title {
    font-size: 3.5rem;
  }
  .page-faq .faq-nav {
    --faq-nav-w: 220px;
  }
}