/* ===== FAQ 页面专属样式 ===== */
.page-faq {
  --faq-accent: #E8B84B;
  --faq-accent-bright: #FFD97A;
  --faq-blue: #00E5FF;
  --faq-border: #3A2450;
  --faq-panel: #140B22;
  --faq-bg: #0A0612;
  --faq-text: #F4E9FF;
  --faq-sub: #B9A6CC;
  --faq-shadow: 8px 8px 0 rgba(0, 0, 0, 0.35);
  overflow-x: hidden;
}

/* ===== 英雄区 ===== */
.faq-hero {
  position: relative;
  background: linear-gradient(135deg, #0A0612 0%, #140B22 70%, #1E1030 100%);
  border-bottom: 3px solid var(--faq-accent);
  padding: var(--space-xl) 0 var(--space-md);
  overflow: hidden;
}

.faq-hero::before {
  content: "?";
  position: absolute;
  top: -70px;
  right: -30px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(220px, 30vw, 420px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 2px rgba(232, 184, 75, 0.12);
  pointer-events: none;
}

.faq-hero-copy {
  position: relative;
  z-index: 1;
  margin-bottom: var(--space-md);
}

.faq-hero-copy .eyebrow-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--faq-accent);
  border: 1px solid var(--faq-accent);
  padding: 5px 12px;
  margin-bottom: 18px;
}

.faq-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(34px, 6vw, 60px);
  font-weight: 900;
  line-height: 1.1;
  margin: 0 0 14px;
  color: var(--faq-text);
  text-shadow: 3px 3px 0 rgba(0, 229, 255, 0.15);
}

.faq-hero h1::after {
  content: "";
  display: block;
  width: 120px;
  height: 5px;
  background: linear-gradient(90deg, var(--faq-accent), var(--faq-blue));
  margin-top: 16px;
}

.faq-hero-desc {
  max-width: 560px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--faq-sub);
  margin: 0;
}

.faq-hero-frame {
  position: relative;
  z-index: 1;
  padding-top: var(--space-sm);
}

.faq-hero-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 4px solid var(--faq-accent);
  box-shadow: 10px 10px 0 rgba(0, 0, 0, 0.35);
}

/* ===== 面包屑 ===== */
.faq-breadcrumb {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: var(--space-md);
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--faq-sub);
}

.faq-breadcrumb a {
  color: var(--faq-blue);
  text-decoration: none;
  transition: color 0.2s;
}

.faq-breadcrumb a:hover {
  color: var(--faq-accent-bright);
  text-decoration: underline;
}

.faq-breadcrumb span[aria-current="page"] {
  color: var(--faq-accent);
}

/* ===== 主布局：目录 + 内容 ===== */
.faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  padding-top: var(--space-lg);
  padding-bottom: var(--space-xl);
}

/* ===== 目录 ===== */
.faq-toc {
  background: var(--faq-panel);
  border: var(--border-thick);
  box-shadow: var(--faq-shadow);
  padding: var(--space-md);
  align-self: start;
}

.faq-toc-label {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--faq-accent);
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--faq-border);
}

.faq-toc-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  counter-reset: faq-toc;
}

.faq-toc-list li {
  counter-increment: faq-toc;
  margin-bottom: 4px;
}

.faq-toc-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  color: var(--faq-text);
  text-decoration: none;
  padding: 8px 4px;
  border-left: 3px solid transparent;
  font-size: 15px;
  font-weight: 500;
  transition: border-color 0.2s, color 0.2s, padding-left 0.2s;
}

.faq-toc-list a::before {
  content: counter(faq-toc, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--faq-accent);
}

.faq-toc-list a:hover,
.faq-toc-list a:focus-visible {
  color: var(--faq-accent-bright);
  border-left-color: var(--faq-accent);
  padding-left: 8px;
  outline: none;
}

.faq-toc-note {
  padding-top: 14px;
  margin-top: 12px;
  border-top: 1px dashed var(--faq-border);
}

.faq-toc-note p {
  margin: 0 0 6px;
  font-size: 14px;
  color: var(--faq-sub);
}

.faq-toc-note .link-neon {
  font-size: 14px;
}

/* ===== 问答内容区 ===== */
.faq-content {
  min-width: 0;
}

.faq-section {
  margin-bottom: var(--space-xl);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.faq-section:target {
  animation: faq-flash 1.2s ease-out;
}

@keyframes faq-flash {
  0% {
    background: rgba(0, 229, 255, 0.08);
  }
  100% {
    background: transparent;
  }
}

.faq-section .section-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: var(--space-md);
  padding-bottom: 12px;
  border-bottom: 3px solid var(--faq-border);
}

.faq-section .section-head .eyebrow-index {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--faq-accent);
  letter-spacing: 2px;
  line-height: 1;
}

.faq-section .section-head h2 {
  font-family: var(--font-head);
  font-size: 24px;
  font-weight: 900;
  color: var(--faq-text);
  margin: 0;
  letter-spacing: 1px;
}

/* ===== 手风琴 ===== */
.faq-item {
  background: var(--faq-panel);
  border: 3px solid var(--faq-border);
  border-left: 5px solid var(--faq-accent);
  margin-bottom: 14px;
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.3);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.faq-item[open] {
  border-left-color: var(--faq-blue);
  box-shadow: 8px 8px 0 rgba(0, 229, 255, 0.08);
}

.faq-toggle {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px;
  cursor: pointer;
  list-style: none;
  user-select: none;
  -webkit-user-select: none;
}

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

.faq-toggle:hover .faq-toggle-text,
.faq-toggle:focus-visible .faq-toggle-text {
  color: var(--faq-accent-bright);
}

.faq-toggle:focus-visible {
  outline: 2px solid var(--faq-blue);
  outline-offset: -2px;
}

.faq-toggle-index {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--faq-accent);
  min-width: 40px;
  letter-spacing: 1px;
}

.faq-toggle-text {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--faq-text);
  transition: color 0.2s;
}

.faq-toggle-icon {
  position: relative;
  width: 22px;
  height: 22px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--faq-accent);
  border: 2px solid var(--faq-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease, background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
  flex-shrink: 0;
}

.faq-item[open] .faq-toggle-icon {
  transform: rotate(45deg);
  background: var(--faq-blue);
  border-color: var(--faq-blue);
  color: var(--faq-bg);
}

/* ===== 答案区 ===== */
.faq-answer {
  padding: 0 16px 18px;
  border-top: 1px dashed var(--faq-border);
  margin-top: -2px;
}

.faq-answer p:first-child {
  margin-top: 16px;
}

.faq-answer p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--faq-sub);
  margin: 0;
}

.faq-answer-more {
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px dashed var(--faq-border);
}

.faq-answer-more a {
  color: var(--faq-blue);
  font-family: var(--font-mono);
  font-size: 13px;
  text-decoration: none;
  letter-spacing: 0.5px;
  transition: color 0.2s;
}

.faq-answer-more a:hover {
  color: var(--faq-accent-bright);
  text-decoration: underline;
}

/* ===== 联系区 ===== */
.faq-contact {
  background: linear-gradient(135deg, #0A0612 0%, #140B22 40%, #0A0612 100%);
  border-top: 4px solid var(--faq-accent);
  padding: var(--space-lg) var(--space-md) var(--space-xl);
}

.faq-contact-inner {
  max-width: var(--container-w);
  margin: 0 auto;
}

.faq-contact-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border: var(--border-thick);
  background: #1E1030;
  box-shadow: var(--faq-shadow);
}

.faq-contact-copy {
  padding: var(--space-lg) var(--space-md);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.faq-contact-copy .eyebrow-index {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--faq-blue);
  letter-spacing: 2px;
}

.faq-contact-copy h2 {
  font-family: var(--font-head);
  font-size: 28px;
  font-weight: 900;
  margin: 8px 0 12px;
  color: var(--faq-text);
}

.faq-contact-copy p {
  color: var(--faq-sub);
  font-size: 15px;
  line-height: 1.8;
  margin: 0 0 20px;
}

.faq-contact-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
  margin-top: 4px;
}

.faq-contact-legal {
  font-size: 14px;
  color: var(--faq-sub);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.faq-contact-legal:hover {
  color: var(--faq-accent-bright);
}

.faq-contact-visual {
  border-top: var(--border-thick);
}

.faq-contact-visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ===== 桌面端 ===== */
@media (min-width: 900px) {
  .faq-hero {
    padding-top: calc(var(--space-xl) * 1.5);
  }

  .faq-hero-copy {
    margin-bottom: var(--space-md);
  }

  .faq-hero-frame {
    padding-top: var(--space-md);
    transform: rotate(-0.5deg) scale(1.01);
  }

  .faq-hero-frame img {
    border-width: 5px;
    box-shadow: 12px 12px 0 rgba(0, 0, 0, 0.4);
  }

  .faq-breadcrumb {
    padding-top: var(--space-md);
  }

  .faq-layout {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: var(--space-xl);
    padding-top: var(--space-xl);
  }

  .faq-toc {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    padding: var(--space-md);
  }

  .faq-toggle {
    padding: 18px 20px;
  }

  .faq-toggle-index {
    min-width: 46px;
    font-size: 14px;
  }

  .faq-answer {
    padding: 0 22px 24px;
  }

  .faq-contact-card {
    grid-template-columns: 1fr 1fr;
    align-items: stretch;
  }

  .faq-contact-copy {
    padding: var(--space-xl);
  }

  .faq-contact-visual {
    border-top: none;
    border-left: var(--border-thick);
  }

  .faq-contact-visual img {
    height: 100%;
    min-height: 340px;
    object-fit: cover;
  }
}

/* ===== 大桌面端：更宽留白 ===== */
@media (min-width: 1280px) {
  .faq-layout {
    gap: calc(var(--space-xl) * 1.2);
  }
}