/* ===== 页面专属 CSS：帮助中心 ===== */
.page-faq {
  --faq-accent: #D32F2F;
  --faq-glow: rgba(211, 47, 47, 0.15);
  --faq-section-gap: 3rem;
  --faq-item-radius: 8px;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
}

/* ===== 首屏头部 ===== */
.page-faq-header {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0 var(--content-padding);
  padding-top: calc(var(--header-height) + 1.5rem);
  padding-bottom: 2rem;
  overflow: hidden;
  min-height: 320px;
}

.page-faq-header-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.page-faq-header-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  opacity: 0.12;
  filter: blur(2px);
  transform: scale(1.02);
}

.page-faq-header-content {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--content-max);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.75rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  color: var(--color-text);
  opacity: 0.65;
  flex-wrap: wrap;
  justify-content: center;
}

.breadcrumb-link {
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity var(--transition-default);
}

.breadcrumb-link:hover,
.breadcrumb-link:focus-visible {
  opacity: 0.75;
  text-decoration: underline;
}

.breadcrumb-sep {
  opacity: 0.4;
  font-size: 0.7rem;
}

.breadcrumb-current {
  font-weight: 500;
}

.page-faq-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 6vw, 3.2rem);
  font-weight: 800;
  letter-spacing: 0.01em;
  line-height: 1.1;
  color: var(--color-text);
  margin: 0;
  text-shadow: 0 2px 12px var(--faq-glow);
}

.page-faq-subtitle {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  line-height: 1.5;
  color: var(--color-text);
  opacity: 0.7;
  max-width: 560px;
  margin: 0 auto;
}

/* ===== 搜索框 ===== */
.page-faq-search {
  width: 100%;
  max-width: 600px;
  margin: 0.75rem auto 0;
}

.page-faq-search-inner {
  display: flex;
  align-items: center;
  background: var(--color-white);
  border: 2px solid var(--color-text);
  border-radius: 50px;
  padding: 0 1.25rem;
  transition: border-color var(--transition-default), box-shadow var(--transition-default);
  clip-path: polygon(0 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
}

.page-faq-search-inner:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 4px var(--faq-glow);
}

.page-faq-search-icon {
  font-size: 1.2rem;
  color: var(--color-accent);
  margin-right: 0.6rem;
  flex-shrink: 0;
  animation: page-faq-star-pulse 2s ease-in-out infinite;
}

@keyframes page-faq-star-pulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.15); }
}

.page-faq-search-input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 0.8rem 0;
  font-size: 1rem;
  font-family: var(--font-body);
  color: var(--color-text);
  outline: none;
  min-width: 0;
}

.page-faq-search-input::placeholder {
  color: var(--color-text);
  opacity: 0.35;
}

/* ===== 快速导航 ===== */
.page-faq-quick-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 0.5rem;
}

.page-faq-quick-link {
  display: inline-block;
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-heading);
  letter-spacing: 0.03em;
  color: var(--color-text);
  background: var(--color-white);
  border: 1.5px solid var(--color-text);
  border-radius: 4px;
  text-decoration: none;
  transition: background var(--transition-default), color var(--transition-default), transform var(--transition-default);
  clip-path: polygon(0 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
}

.page-faq-quick-link:hover,
.page-faq-quick-link:focus-visible {
  background: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

/* ===== 主体内容区 ===== */
.page-faq-body {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--content-padding) 3rem;
  display: flex;
  flex-direction: column;
  gap: var(--faq-section-gap);
}

/* ===== 每个章节 ===== */
.page-faq-section {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding: 2rem 1.5rem;
  background: var(--color-white);
  border: 1px solid var(--color-text);
  border-radius: 4px;
  position: relative;
  clip-path: polygon(0 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
  box-shadow: 4px 4px 0 var(--color-text);
  transition: box-shadow var(--transition-default);
}

.page-faq-section:hover {
  box-shadow: 6px 6px 0 var(--color-text);
}

.page-faq-section-alt {
  background: #faf3e8;
}

.page-faq-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--section-accent, var(--color-accent));
  opacity: 0.6;
}

/* ===== 章节头部 ===== */
.page-faq-section-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  position: relative;
  flex-wrap: wrap;
}

.section-number {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1;
  color: var(--section-accent, var(--color-accent));
  opacity: 0.25;
  user-select: none;
  flex-shrink: 0;
}

.page-faq-section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
  line-height: 1.2;
}

.page-faq-section-tag {
  --tag-bg: var(--color-accent);
  margin-left: auto;
  align-self: flex-start;
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  background: var(--tag-bg);
  color: var(--color-white);
  border-radius: 2px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  clip-path: polygon(0 0, 100% 0, calc(100% - 3px) 100%, 0 100%);
}

/* ===== 章节内容区 ===== */
.page-faq-section-body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* ===== 单个问答项 ===== */
.page-faq-item {
  border-bottom: 1px solid rgba(62, 39, 35, 0.1);
}

.page-faq-item:last-child {
  border-bottom: none;
}

.page-faq-details {
  display: block;
  width: 100%;
}

.page-faq-details[open] .page-faq-answer {
  animation: page-faq-slide-down 0.3s ease-out;
}

@keyframes page-faq-slide-down {
  from {
    opacity: 0;
    max-height: 0;
  }
  to {
    opacity: 1;
    max-height: 400px;
  }
}

.page-faq-question {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 0;
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background var(--transition-default);
  border-radius: 4px;
}

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

.page-faq-question:hover {
  background: rgba(211, 47, 47, 0.04);
}

.page-faq-q-icon {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 0.85rem;
  color: var(--color-accent);
  background: var(--color-bg);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  flex-shrink: 0;
  border: 1.5px solid var(--color-accent);
}

.page-faq-q-text {
  flex: 1;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text);
}

.page-faq-toggle {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  position: relative;
  transition: transform var(--transition-default);
}

.page-faq-toggle::before,
.page-faq-toggle::after {
  content: '';
  position: absolute;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-default);
}

.page-faq-toggle::before {
  width: 2px;
  height: 14px;
  top: 3px;
  left: 9px;
}

.page-faq-toggle::after {
  width: 14px;
  height: 2px;
  top: 9px;
  left: 3px;
}

details[open] .page-faq-toggle {
  transform: rotate(45deg);
}

details[open] .page-faq-toggle::before {
  transform: scaleY(0);
}

/* ===== 答案区 ===== */
.page-faq-answer {
  padding: 0 0 1rem 2.2rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--color-text);
  opacity: 0.85;
}

.page-faq-answer p {
  margin: 0 0 0.75rem;
}

.page-faq-contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  padding: 0.35rem 0.9rem;
  margin-top: 0.25rem;
  border-color: var(--color-accent);
  color: var(--color-accent);
  text-decoration: none;
  transition: background var(--transition-default), color var(--transition-default);
}

.page-faq-contact-btn:hover,
.page-faq-contact-btn:focus-visible {
  background: var(--color-accent);
  color: var(--color-white);
}

/* ===== 章节尾部图片 ===== */
.page-faq-section-footer {
  margin-top: 0.5rem;
  display: flex;
  justify-content: center;
}

.page-faq-section-img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  border: 1px solid var(--color-text);
  opacity: 0.75;
  transition: opacity var(--transition-default);
}

.page-faq-section-img:hover {
  opacity: 1;
}

.page-faq-trust-note {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--color-text);
  opacity: 0.7;
  text-align: center;
  padding: 0.75rem 1rem;
  background: rgba(0, 230, 118, 0.08);
  border-left: 3px solid var(--color-green);
  border-radius: 2px;
  max-width: 600px;
  margin: 0 auto;
}

/* ===== 底部 CTA ===== */
.page-faq-cta {
  margin-top: 1rem;
  padding: 2.5rem 1.5rem;
  background: var(--color-dark);
  clip-path: polygon(0 0, 100% 0, calc(100% - 16px) 100%, 0 100%);
  text-align: center;
}

.page-faq-cta-inner {
  max-width: 500px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.page-faq-cta-title {
  font-family: var(--font-heading);
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  font-weight: 700;
  color: var(--color-bg);
  margin: 0;
}

.page-faq-cta-text {
  font-size: 0.95rem;
  color: var(--color-bg);
  opacity: 0.7;
  margin: 0;
}

.page-faq-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1.8rem;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  background: var(--color-accent);
  color: var(--color-white);
  border: none;
  border-radius: 4px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
  transition: transform var(--transition-default), box-shadow var(--transition-default);
  cursor: pointer;
}

.page-faq-cta-btn:hover,
.page-faq-cta-btn:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(211, 47, 47, 0.35);
}

/* ===== 响应式布局 ===== */
@media (max-width: 640px) {
  .page-faq-header {
    min-height: 260px;
    padding-top: calc(var(--header-height) + 1rem);
    padding-bottom: 1.5rem;
  }

  .page-faq-quick-nav {
    gap: 0.35rem;
  }

  .page-faq-quick-link {
    font-size: 0.75rem;
    padding: 0.3rem 0.7rem;
  }

  .page-faq-section {
    padding: 1.25rem 0.9rem;
    clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  }

  .section-number {
    font-size: 2rem;
  }

  .page-faq-q-text {
    font-size: 0.88rem;
  }

  .page-faq-answer {
    padding-left: 1.2rem;
    font-size: 0.85rem;
  }

  .page-faq-section-footer {
    flex-direction: column;
    align-items: center;
  }

  .page-faq-trust-note {
    font-size: 0.8rem;
  }

  .page-faq-cta {
    padding: 2rem 1rem;
  }
}

@media (min-width: 641px) and (max-width: 1024px) {
  .page-faq-section {
    padding: 1.5rem 1.25rem;
  }
}

@media (min-width: 1025px) {
  .page-faq-section {
    padding: 2rem 2.2rem;
  }

  .page-faq-section-body {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}

/* ===== 搜索高亮交互（渐进增强） ===== */
.page-faq-search-input[value]:not([value=""]) ~ .page-faq-header-content .page-faq-quick-link,
.page-faq-search-input:not(:placeholder-shown) ~ .page-faq-header-content .page-faq-quick-link {
  /* 搜索有内容时快速导航保持可见，不做隐藏 */
}

/* 搜索过滤：隐藏不匹配项（通过JS增强，这里提供样式基础） */
.page-faq-item.hidden-by-search {
  display: none;
}

/* ===== 全局辅助 ===== */
.page-faq .btn {
  font-family: var(--font-body);
}

.page-faq .btn-outline {
  background: transparent;
  border: 1.5px solid var(--color-text);
  color: var(--color-text);
}

.page-faq .btn-outline:hover {
  background: var(--color-text);
  color: var(--color-bg);
}

.page-faq .btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
  border: none;
}

/* ===== 装饰星光粒子 ===== */
.page-faq-header::after {
  content: '';
  position: absolute;
  top: 10%;
  right: 5%;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle at center, rgba(211, 47, 47, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  animation: page-faq-drift 6s ease-in-out infinite alternate;
}

.page-faq-header::before {
  content: '';
  position: absolute;
  bottom: 5%;
  left: 8%;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle at center, rgba(25, 118, 210, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  animation: page-faq-drift 8s ease-in-out infinite alternate-reverse;
}

@keyframes page-faq-drift {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(15px, -10px) scale(1.08); }
}

/* ===== 打印优化 ===== */
@media print {
  .page-faq-header {
    min-height: auto;
    padding-top: 1rem;
  }

  .page-faq-search,
  .page-faq-quick-nav,
  .page-faq-toggle,
  .page-faq-contact-btn,
  .page-faq-cta {
    display: none;
  }

  .page-faq-details[open] .page-faq-answer {
    animation: none;
  }

  .page-faq-question {
    cursor: default;
  }

  .page-faq-section {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ccc;
  }
}

.page-faq {
  --section-accent: transparent;
}