/* ===== 页面作用域：.page-faq ===== */
.page-faq {
  --faq-max-width: 800px;
  --faq-card-gap: 20px;
  --faq-q-font-size: clamp(17px, 1.6vw, 22px);
  --faq-icon-size: 26px;
  --faq-number-size: clamp(18px, 1.8vw, 26px);
  --faq-hero-line-width: 60px;
  position: relative;
  background: var(--c-bg, #0B1A2E);
  min-height: 80vh;
}

/* ---------- Hero 区 ---------- */
.page-faq__hero {
  padding: var(--space-xl, 64px) 0 var(--space-lg, 32px);
  text-align: center;
  position: relative;
}
.page-faq__hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at 30% 20%, rgba(0, 180, 216, 0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 80%, rgba(230, 57, 70, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}
.page-faq__hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.page-faq__hero-icon-wrap {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--c-glass, rgba(255,255,255,0.08));
  border: 2px solid var(--c-glass-border, rgba(255,255,255,0.12));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md, 16px);
  box-shadow: 0 0 30px rgba(0, 180, 216, 0.2);
  transition: box-shadow var(--transition, 0.3s);
}
.page-faq__hero-icon-wrap:hover {
  box-shadow: 0 0 50px rgba(0, 180, 216, 0.4);
}
.page-faq__hero-img {
  width: 56px;
  height: 56px;
  object-fit: contain;
  display: block;
  filter: brightness(0) invert(1);
}
.page-faq__title {
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-size: var(--h1, clamp(36px,6vw,64px));
  font-weight: 900;
  color: var(--c-text, #F4F4F4);
  margin: 0 0 var(--space-sm, 8px);
  letter-spacing: -0.02em;
  text-transform: uppercase;
}
.page-faq__subtitle {
  font-family: var(--font-body, 'Open Sans', sans-serif);
  font-size: var(--body, clamp(14px,1.2vw,16px));
  color: var(--c-text-secondary, #CCCCCC);
  max-width: 520px;
  margin: 0 auto var(--space-md, 16px);
  line-height: 1.7;
}
.page-faq__hero-line {
  width: var(--faq-hero-line-width);
  height: 3px;
  background: linear-gradient(90deg, var(--c-accent-red, #E63946), var(--c-accent-gold, #FFD700));
  border-radius: 2px;
  margin-top: var(--space-xs, 4px);
}

/* ---------- FAQ 列表 ---------- */
.page-faq__list-section {
  padding: var(--space-lg, 32px) 0 var(--space-xl, 64px);
}
.page-faq__list-container {
  max-width: var(--faq-max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--faq-card-gap);
}

/* 单个 FAQ 卡片 */
.page-faq__item {
  background: var(--c-glass, rgba(255,255,255,0.08));
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--c-glass-border, rgba(255,255,255,0.12));
  border-radius: var(--radius, 8px);
  overflow: hidden;
  transition: border-color var(--transition, 0.3s), box-shadow var(--transition, 0.3s);
  padding: 0;
}
.page-faq__item:hover {
  border-color: rgba(0, 180, 216, 0.3);
  box-shadow: 0 0 24px rgba(0, 180, 216, 0.08);
}
.page-faq__item[open] {
  border-color: rgba(0, 180, 216, 0.4);
  box-shadow: 0 0 32px rgba(0, 180, 216, 0.12);
}

/* 问题标题（可点击区域） */
.page-faq__question {
  display: flex;
  align-items: center;
  gap: var(--space-sm, 8px);
  padding: var(--space-md, 16px) var(--space-lg, 32px);
  cursor: pointer;
  list-style: none;
  user-select: none;
  -webkit-user-select: none;
  transition: background var(--transition, 0.3s);
}
.page-faq__question::-webkit-details-marker {
  display: none;
}
.page-faq__question::-moz-list-bullet {
  list-style: none;
}
.page-faq__question:hover {
  background: rgba(255, 255, 255, 0.03);
}
.page-faq__question:focus-visible {
  outline: 2px solid var(--c-accent-blue, #00B4D8);
  outline-offset: -2px;
  border-radius: var(--radius, 8px);
}

/* 编号 */
.page-faq__q-number {
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-size: var(--faq-number-size);
  font-weight: 900;
  color: var(--c-accent-gold, #FFD700);
  min-width: 2.4em;
  line-height: 1;
  opacity: 0.85;
  flex-shrink: 0;
}

/* 问题文本 */
.page-faq__q-text {
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-size: var(--faq-q-font-size);
  font-weight: 700;
  color: var(--c-accent-blue, #00B4D8);
  flex: 1;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

/* 展开/收缩图标 */
.page-faq__q-icon {
  width: var(--faq-icon-size);
  height: var(--faq-icon-size);
  color: var(--c-text-secondary, #CCCCCC);
  flex-shrink: 0;
  transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94), color 0.3s;
}
.page-faq__item[open] .page-faq__q-icon {
  transform: rotate(180deg);
  color: var(--c-accent-blue, #00B4D8);
}

/* 答案区域 */
.page-faq__answer {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  padding: 0 var(--space-lg, 32px);
  transition: max-height 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              opacity 0.35s ease,
              padding 0.3s ease;
}
.page-faq__item[open] .page-faq__answer {
  max-height: 600px;
  opacity: 1;
  padding: 0 var(--space-lg, 32px) var(--space-lg, 32px);
}
.page-faq__answer p {
  font-family: var(--font-body, 'Open Sans', sans-serif);
  font-size: var(--body, clamp(14px,1.2vw,16px));
  color: var(--c-text, #F4F4F4);
  line-height: 1.7;
  margin: 0 0 var(--space-sm, 8px);
}
.page-faq__answer p:last-child {
  margin-bottom: 0;
}
.page-faq__answer a {
  color: var(--c-accent-blue, #00B4D8);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color var(--transition, 0.3s);
}
.page-faq__answer a:hover {
  color: var(--c-accent-gold, #FFD700);
}

/* 答案中的高亮行 */
.page-faq__answer-highlight {
  margin-top: var(--space-sm, 8px);
  font-family: var(--font-body, 'Open Sans', sans-serif);
  font-size: calc(var(--body, 16px) * 0.95);
  color: var(--c-text-secondary, #CCCCCC);
  padding: var(--space-sm, 8px) var(--space-md, 16px);
  background: rgba(230, 57, 70, 0.08);
  border-left: 3px solid var(--c-accent-red, #E63946);
  border-radius: 0 var(--radius-sm, 4px) var(--radius-sm, 4px) 0;
}
.page-faq__answer-highlight .b-data {
  color: var(--c-accent-red, #E63946);
  font-weight: 700;
  font-size: 1.1em;
}

/* 数据标签 */
.page-faq__answer-tag {
  margin-top: var(--space-sm, 8px);
  font-family: var(--font-body, 'Open Sans', sans-serif);
  font-size: var(--caption, clamp(11px,0.9vw,12px));
  color: var(--c-accent-gold, #FFD700);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--space-xs, 4px) var(--space-sm, 8px);
  background: rgba(255, 215, 0, 0.08);
  border-radius: var(--radius-sm, 4px);
  display: inline-block;
}

/* 关注列表中的操作列表 */
.page-faq__answer-list {
  list-style: none;
  padding: 0;
  margin: var(--space-sm, 8px) 0 var(--space-sm, 8px);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm, 8px);
}
.page-faq__answer-list li {
  font-family: var(--font-body, 'Open Sans', sans-serif);
  font-size: var(--body, clamp(14px,1.2vw,16px));
  color: var(--c-text, #F4F4F4);
  line-height: 1.6;
  display: flex;
  align-items: center;
  gap: var(--space-sm, 8px);
  flex-wrap: wrap;
}
.page-faq__answer-list .b-badge {
  flex-shrink: 0;
  font-size: calc(var(--caption, 12px) * 0.9);
  padding: 2px 10px;
}

/* 浏览器兼容区块 */
.page-faq__browser-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm, 8px);
  margin: var(--space-md, 16px) 0 var(--space-sm, 8px);
}
.page-faq__browser-chip {
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-size: var(--caption, clamp(11px,0.9vw,12px));
  font-weight: 700;
  color: var(--c-text, #F4F4F4);
  background: var(--c-glass, rgba(255,255,255,0.08));
  border: 1px solid var(--c-glass-border, rgba(255,255,255,0.12));
  padding: 5px 16px;
  border-radius: 20px;
  letter-spacing: 0.03em;
  transition: background var(--transition, 0.3s), border-color var(--transition, 0.3s);
}
.page-faq__browser-chip:hover {
  background: rgba(0, 180, 216, 0.15);
  border-color: var(--c-accent-blue, #00B4D8);
}
.page-faq__browser-img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm, 4px);
  margin: var(--space-sm, 8px) 0;
  display: block;
  background: var(--c-glass, rgba(255,255,255,0.04));
  padding: 8px;
  border: 1px solid var(--c-glass-border, rgba(255,255,255,0.08));
}

/* ---------- CTA 区 ---------- */
.page-faq__cta {
  padding: 0 0 var(--space-xl, 64px);
}
.page-faq__cta-inner {
  max-width: var(--faq-max-width);
  margin: 0 auto;
}
.page-faq__cta-card {
  text-align: center;
  padding: var(--space-xl, 64px) var(--space-lg, 32px);
  background: linear-gradient(135deg, rgba(230, 57, 70, 0.10) 0%, rgba(0, 180, 216, 0.06) 100%);
  border: 1px solid var(--c-glass-border, rgba(255,255,255,0.12));
}
.page-faq__cta-title {
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-size: var(--h3, clamp(22px,3vw,32px));
  font-weight: 800;
  color: var(--c-text, #F4F4F4);
  margin: 0 0 var(--space-sm, 8px);
}
.page-faq__cta-text {
  font-family: var(--font-body, 'Open Sans', sans-serif);
  font-size: var(--body, clamp(14px,1.2vw,16px));
  color: var(--c-text-secondary, #CCCCCC);
  margin: 0 0 var(--space-lg, 32px);
  line-height: 1.6;
}
.page-faq__cta-card .b-btn--primary {
  display: inline-block;
  padding: 12px 36px;
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-size: var(--body, clamp(14px,1.2vw,16px));
  font-weight: 700;
  color: #fff;
  background: var(--c-accent-red, #E63946);
  border: none;
  border-radius: var(--radius, 8px);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: background var(--transition, 0.3s), box-shadow var(--transition, 0.3s), transform 0.2s;
  text-decoration: none;
}
.page-faq__cta-card .b-btn--primary:hover {
  background: #c5303c;
  box-shadow: 0 0 30px rgba(230, 57, 70, 0.35);
  transform: translateY(-2px);
}
.page-faq__cta-card .b-btn--primary:focus-visible {
  outline: 3px solid var(--c-accent-gold, #FFD700);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq__question {
    padding: var(--space-md, 16px) var(--space-xl, 64px);
  }
  .page-faq__answer {
    padding: 0 var(--space-xl, 64px);
  }
  .page-faq__item[open] .page-faq__answer {
    padding: 0 var(--space-xl, 64px) var(--space-lg, 32px);
  }
  .page-faq__hero {
    padding: calc(var(--space-xl, 64px) * 1.2) 0 var(--space-lg, 32px);
  }
  .page-faq__subtitle {
    font-size: calc(var(--body, 16px) * 1.1);
  }
  .page-faq__browser-grid {
    gap: var(--space-md, 16px);
  }
  .page-faq__cta-card {
    padding: var(--space-xl, 64px) var(--space-xl, 64px);
  }
}

@media (min-width: 1024px) {
  .page-faq__hero {
    padding: calc(var(--space-xl, 64px) * 1.6) 0 var(--space-lg, 32px);
  }
  .page-faq__hero-icon-wrap {
    width: 120px;
    height: 120px;
    margin-bottom: var(--space-lg, 32px);
  }
  .page-faq__hero-img {
    width: 68px;
    height: 68px;
  }
  .page-faq__list-container {
    gap: calc(var(--faq-card-gap) * 1.3);
  }
  .page-faq__question {
    padding: var(--space-lg, 32px) 80px;
  }
  .page-faq__answer {
    padding: 0 80px;
  }
  .page-faq__item[open] .page-faq__answer {
    padding: 0 80px var(--space-xl, 64px);
  }
  .page-faq__q-text {
    font-size: calc(var(--faq-q-font-size) * 1.1);
  }
  .page-faq__q-number {
    font-size: calc(var(--faq-number-size) * 1.1);
  }
  .page-faq__cta-title {
    font-size: calc(var(--h3, 32px) * 1.15);
  }
  .page-faq__browser-chip {
    font-size: var(--body, clamp(14px,1.2vw,16px));
    padding: 6px 20px;
  }
}

@media (min-width: 1280px) {
  .page-faq__question {
    padding: var(--space-lg, 32px) 100px;
  }
  .page-faq__answer {
    padding: 0 100px;
  }
  .page-faq__item[open] .page-faq__answer {
    padding: 0 100px var(--space-xl, 64px);
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq__q-icon {
    transition: none;
  }
  .page-faq__answer {
    transition: none;
  }
  .page-faq__item,
  .page-faq__question,
  .page-faq__hero-icon-wrap,
  .page-faq__cta-card .b-btn--primary {
    transition: none;
  }
  .page-faq__cta-card .b-btn--primary:hover {
    transform: none;
  }
  .page-faq__hero-icon-wrap:hover {
    box-shadow: 0 0 30px rgba(0, 180, 216, 0.2);
  }
}