/* ===== 页面唯一作用域：.page-faq ===== */
.page-faq {
  --faq-glow-color: var(--color-accent2, #39FF14);
  --faq-accent: var(--color-accent1, #7B2FF7);
  --faq-card-bg: var(--color-bg-card, #102A4A);
  --faq-border: var(--color-border, #1E3A5F);
  display: block;
  width: 100%;
  max-width: 100%;
  padding: 0;
  margin: 0;
  background-color: var(--color-bg, #0B1D3A);
  color: var(--color-text-primary, #FFFFFF);
  font-family: var(--font-heading, Arial, 'Noto Sans SC', sans-serif);
  line-height: 1.6;
}

/* ---- Hero 区域 ---- */
.page-faq .faq-hero {
  position: relative;
  padding: 5rem 1.5rem 3.5rem;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(123,47,247,0.12) 0%, transparent 70%);
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 2;
  max-width: 720px;
  margin: 0 auto;
}

.page-faq .faq-hero-badge {
  display: inline-block;
  font-family: var(--font-mono, 'Courier New', monospace);
  font-size: 0.85rem;
  letter-spacing: 0.4em;
  color: var(--faq-glow-color);
  background: rgba(57,255,20,0.08);
  padding: 0.35rem 1.2rem;
  border-radius: 100px;
  border: 1px solid rgba(57,255,20,0.25);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.page-faq .faq-hero-title {
  font-size: clamp(2.6rem, 10vw, 5rem);
  font-weight: 100;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--color-text-primary, #FFFFFF);
  margin: 0 0 1rem;
}

.page-faq .faq-hero-desc {
  font-size: 1.15rem;
  color: var(--color-text-secondary, #B0BEC5);
  max-width: 560px;
  margin: 0 auto;
  font-weight: 400;
}

.page-faq .faq-hero-glow {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(57,255,20,0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 1;
}

/* ---- 板块通用 ---- */
.page-faq .faq-section {
  max-width: var(--width-max, 1200px);
  margin: 0 auto;
  padding: 3.5rem 1.5rem;
}

.page-faq .faq-section-head {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  margin-bottom: 2.5rem;
}

.page-faq .faq-section-num {
  font-family: var(--font-mono, 'Courier New', monospace);
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--faq-glow-color);
  opacity: 0.7;
  line-height: 1;
}

.page-faq .faq-section-title {
  font-size: 1.75rem;
  font-weight: 900;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--color-text-primary, #FFFFFF);
  white-space: nowrap;
}

.page-faq .faq-section-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--faq-border) 0%, transparent 100%);
  min-width: 40px;
}

/* ---- 卡片网格 ---- */
.page-faq .faq-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .page-faq .faq-grid {
    gap: 1.75rem;
  }
  .page-faq .faq-grid-nav {
    grid-template-columns: 1fr 1fr;
  }
  .page-faq .faq-grid-nav .faq-card:nth-child(3) {
    grid-column: 1 / 3;
  }
  .page-faq .faq-grid-sub {
    grid-template-columns: 2fr 1fr;
  }
  .page-faq .faq-grid-sub .faq-card-wide {
    grid-column: 1;
  }
  .page-faq .faq-grid-sub .faq-card-slim {
    grid-column: 2;
  }
  .page-faq .faq-grid-tech {
    grid-template-columns: 1fr 1fr;
  }
  .page-faq .faq-grid-tech .faq-card:nth-child(3) {
    grid-column: 1 / 3;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-grid {
    gap: 2rem;
  }
  .page-faq .faq-grid-nav {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .page-faq .faq-grid-nav .faq-card:nth-child(1) {
    grid-column: 1;
  }
  .page-faq .faq-grid-nav .faq-card:nth-child(2) {
    grid-column: 2;
  }
  .page-faq .faq-grid-nav .faq-card:nth-child(3) {
    grid-column: 1 / 4;
  }
  .page-faq .faq-grid-sub {
    grid-template-columns: 2.5fr 1.2fr;
  }
  .page-faq .faq-grid-tech {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .page-faq .faq-grid-tech .faq-card:nth-child(1) {
    grid-column: 1;
  }
  .page-faq .faq-grid-tech .faq-card:nth-child(2) {
    grid-column: 2;
  }
  .page-faq .faq-grid-tech .faq-card:nth-child(3) {
    grid-column: 1 / 4;
  }
}

/* ---- 卡片 ---- */
.page-faq .faq-card {
  background: var(--faq-card-bg);
  border: 1px solid var(--faq-border);
  border-radius: 12px;
  overflow: hidden;
  transition: box-shadow 0.35s ease, border-color 0.35s ease, filter 0.3s ease;
  filter: brightness(1);
}

.page-faq .faq-card:hover {
  border-color: rgba(57,255,20,0.25);
  box-shadow: 0 0 18px rgba(57,255,20,0.08);
  filter: brightness(1.08);
}

.page-faq .faq-card[open] {
  border-color: rgba(57,255,20,0.3);
  box-shadow: 0 0 24px rgba(57,255,20,0.10);
}

.page-faq .faq-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background 0.25s;
}

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

.page-faq .faq-card-header:hover {
  background: rgba(57,255,20,0.03);
}

.page-faq .faq-icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.6rem;
  height: 2.6rem;
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--faq-glow-color);
  background: rgba(57,255,20,0.07);
  border-radius: 50%;
  transition: background 0.3s, transform 0.3s;
  line-height: 1;
}

.page-faq .faq-card[open] .faq-icon {
  background: rgba(57,255,20,0.15);
  transform: scale(1.05);
}

.page-faq .faq-question {
  flex: 1;
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--color-text-primary, #FFFFFF);
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.page-faq .faq-toggle {
  flex-shrink: 0;
  width: 1.6rem;
  height: 1.6rem;
  position: relative;
  transition: transform 0.35s ease;
}

.page-faq .faq-toggle::before,
.page-faq .faq-toggle::after {
  content: '';
  position: absolute;
  background: var(--color-text-secondary, #B0BEC5);
  border-radius: 2px;
  transition: transform 0.35s ease, background 0.3s;
}

.page-faq .faq-toggle::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  transform: translateY(-50%) rotate(0deg);
}

.page-faq .faq-toggle::after {
  top: 0;
  left: 50%;
  width: 2px;
  height: 100%;
  transform: translateX(-50%) rotate(0deg);
}

.page-faq .faq-card[open] .faq-toggle::before {
  transform: translateY(-50%) rotate(180deg);
  background: var(--faq-glow-color);
}

.page-faq .faq-card[open] .faq-toggle::after {
  transform: translateX(-50%) rotate(90deg);
  background: var(--faq-glow-color);
}

.page-faq .faq-card[open] .faq-toggle {
  transform: rotate(90deg);
}

/* ---- 答案区域 ---- */
.page-faq .faq-answer {
  padding: 0 1.5rem 1.5rem;
  animation: faqFadeIn 0.4s ease forwards;
}

@keyframes faqFadeIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-answer p {
  margin: 0 0 0.75rem;
  color: var(--color-text-secondary, #B0BEC5);
  font-size: 1rem;
  line-height: 1.7;
  max-width: 680px;
}

.page-faq .faq-answer p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-link {
  color: var(--faq-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.25s, text-decoration-color 0.25s;
  text-decoration-color: rgba(123,47,247,0.3);
}

.page-faq .faq-link:hover {
  color: var(--faq-glow-color);
  text-decoration-color: rgba(57,255,20,0.5);
}

/* ---- 图片 ---- */
.page-faq .faq-img-wrap {
  margin-top: 1.25rem;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--faq-border);
  background: var(--color-bg, #0B1D3A);
}

.page-faq .faq-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: auto;
}

/* ---- CTA 区域 ---- */
.page-faq .faq-cta {
  max-width: var(--width-max, 1200px);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4.5rem;
  text-align: center;
}

.page-faq .faq-cta-text {
  font-size: 1.2rem;
  color: var(--color-text-secondary, #B0BEC5);
  margin: 0 0 1.5rem;
  font-weight: 400;
}

.page-faq .faq-cta-btn {
  display: inline-block;
  padding: 0.85rem 2.8rem;
  font-family: var(--font-heading, Arial, 'Noto Sans SC', sans-serif);
  font-size: 1.1rem;
  font-weight: 900;
  color: #FFFFFF;
  background: linear-gradient(135deg, var(--faq-accent), var(--faq-glow-color));
  border-radius: 60px;
  text-decoration: none;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 4px 20px rgba(123,47,247,0.25);
}

.page-faq .faq-cta-btn:hover {
  transform: scale(1.04);
  box-shadow: 0 6px 32px rgba(123,47,247,0.4);
}

/* ---- 移动端窄屏适配 ---- */
@media (max-width: 767px) {
  .page-faq .faq-hero {
    padding: 4rem 1.25rem 2.5rem;
  }
  .page-faq .faq-hero-title {
    font-size: clamp(2rem, 12vw, 2.8rem);
  }
  .page-faq .faq-hero-desc {
    font-size: 1rem;
  }
  .page-faq .faq-section {
    padding: 2.5rem 1.25rem;
  }
  .page-faq .faq-section-head {
    gap: 0.8rem;
    margin-bottom: 1.75rem;
    flex-wrap: wrap;
  }
  .page-faq .faq-section-num {
    font-size: 1.2rem;
  }
  .page-faq .faq-section-title {
    font-size: 1.4rem;
  }
  .page-faq .faq-section-line {
    display: none;
  }
  .page-faq .faq-card-header {
    padding: 1rem 1.25rem;
    gap: 0.75rem;
  }
  .page-faq .faq-icon {
    width: 2.2rem;
    height: 2.2rem;
    font-size: 1.4rem;
  }
  .page-faq .faq-question {
    font-size: 1rem;
  }
  .page-faq .faq-answer {
    padding: 0 1.25rem 1.25rem;
  }
  .page-faq .faq-cta {
    padding: 2rem 1.25rem 3.5rem;
  }
  .page-faq .faq-cta-btn {
    padding: 0.75rem 2.2rem;
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .page-faq .faq-hero {
    padding: 3rem 1rem 2rem;
  }
  .page-faq .faq-hero-title {
    font-size: clamp(1.8rem, 10vw, 2.2rem);
  }
  .page-faq .faq-section {
    padding: 1.75rem 1rem;
  }
  .page-faq .faq-grid {
    gap: 1rem;
  }
  .page-faq .faq-card-header {
    padding: 0.85rem 1rem;
    gap: 0.6rem;
  }
  .page-faq .faq-icon {
    width: 1.8rem;
    height: 1.8rem;
    font-size: 1.1rem;
  }
  .page-faq .faq-question {
    font-size: 0.95rem;
  }
  .page-faq .faq-answer {
    padding: 0 1rem 1rem;
  }
  .page-faq .faq-answer p {
    font-size: 0.92rem;
  }
}

/* ---- 安全边界 ---- */
.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq a {
  color: inherit;
}

.page-faq img {
  max-width: 100%;
  height: auto;
}