/* ==========================================================================
   Boostnet - 01 超频脉冲 (OVERCLOCK PULSE) 视觉风格
   背景 #040A08 ｜ 主色 #4ADE80 ｜ 点缀 #A7F3D0
   Zero external dependencies | Mobile-first responsive | Lightning fast
   ========================================================================== */

:root {
  --bg-primary: #040A08;
  --bg-secondary: #071910;
  --bg-card: rgba(8, 26, 17, 0.72);
  --bg-card-hover: rgba(12, 38, 24, 0.88);
  --border-color: rgba(74, 222, 128, 0.12);
  --border-highlight: rgba(74, 222, 128, 0.45);
  
  --text-primary: #f0fdf4;
  --text-secondary: #86efac;
  --text-muted: #4ade80;
  
  --accent-cyan: #4ade80;
  --accent-blue: #22c55e;
  --accent-purple: #10b981;
  --accent-gradient: linear-gradient(135deg, #16a34a 0%, #22c55e 50%, #4ade80 100%);
  --accent-glow: 0 0 25px rgba(74, 222, 128, 0.4);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --transition: all 0.25s ease;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

/* Accessibility: Focus visible outline for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
}

/* Accessibility: Skip to main content keyboard entrance */
.skip-link {
  position: absolute;
  top: -80px;
  left: 20px;
  background: var(--bg-secondary);
  color: var(--accent-cyan);
  padding: 12px 24px;
  border: 2px solid var(--accent-cyan);
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.95rem;
  z-index: 10001;
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
  transition: top 0.2s ease-in-out;
}

.skip-link:focus {
  top: 15px;
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

img, svg {
  display: block;
  max-width: 100%;
}

ul {
  list-style: none;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Buttons & CTA */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 1rem;
  padding: 12px 26px;
  min-height: 48px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  border: 1px solid transparent;
  gap: 8px;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 6px 24px rgba(124, 58, 237, 0.5);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.btn-sm {
  padding: 8px 18px;
  min-height: 38px;
  font-size: 0.88rem;
}

.btn-block {
  width: 100%;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(4, 10, 8, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 14px 0;
}

.navbar .nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #ffffff;
}

.brand-logo .logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}

.brand-logo span {
  background: linear-gradient(135deg, #ffffff 40%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--accent-cyan);
}

/* Hero Section */
.hero-section {
  padding: 85px 0 65px;
  text-align: center;
  position: relative;
  background: transparent;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(74, 222, 128, 0.1);
  border: 1px solid rgba(74, 222, 128, 0.28);
  color: var(--accent-cyan);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background-color: #4ade80;
  border-radius: 50%;
  box-shadow: 0 0 8px #4ade80;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.8px;
  margin-bottom: 20px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  container-type: inline-size;
}

.hero-title .highlight {
  background: linear-gradient(135deg, #4ade80 0%, #a7f3d0 50%, #ffffff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 主标题右侧迷你等化器 (规格：5 根圆角竖条，总宽约 4.8cqw、高约 4cqw，颜色 #4ADE80，底部对齐) */
.overclock-mini-eq {
  display: inline-flex;
  align-items: flex-end;
  justify-content: space-between;
  width: 4.8cqw;
  min-width: 22px;
  max-width: 44px;
  height: 4cqw;
  min-height: 18px;
  max-height: 36px;
  vertical-align: baseline;
  margin-left: 0.35em;
  gap: 2px;
  pointer-events: none;
  white-space: nowrap;
}

.overclock-mini-eq .eq-bar {
  flex: 1;
  height: 100%;
  background-color: #4ADE80;
  border-radius: 9999px;
  transform-origin: bottom center;
  box-shadow: 0 0 8px rgba(74, 222, 128, 0.6);
  will-change: transform, opacity;
  animation: overclock-eq-scale 1.1s ease-in-out infinite alternate;
}

/* 5 根竖条不同周期 (0.9s ~ 1.3s) 做 scaleY 30% → 100% 起伏 */
.overclock-mini-eq .eq-bar:nth-child(1) { animation-duration: 0.92s; animation-delay: 0.05s; }
.overclock-mini-eq .eq-bar:nth-child(2) { animation-duration: 1.28s; animation-delay: 0.22s; }
.overclock-mini-eq .eq-bar:nth-child(3) { animation-duration: 0.90s; animation-delay: 0.00s; }
.overclock-mini-eq .eq-bar:nth-child(4) { animation-duration: 1.15s; animation-delay: 0.16s; }
.overclock-mini-eq .eq-bar:nth-child(5) { animation-duration: 1.30s; animation-delay: 0.08s; }

@keyframes overclock-eq-scale {
  0% {
    transform: scaleY(0.3);
    opacity: 0.65;
    box-shadow: 0 0 4px rgba(74, 222, 128, 0.4);
  }
  100% {
    transform: scaleY(1.0);
    opacity: 1;
    box-shadow: 0 0 12px #4ADE80, 0 0 20px rgba(167, 243, 208, 0.7);
  }
}

/* 遵守 prefers-reduced-motion：减弱动效模式下退化为静态画面 */
@media (prefers-reduced-motion: reduce) {
  .overclock-mini-eq .eq-bar {
    animation: none;
    transform: scaleY(0.85);
    box-shadow: 0 0 8px rgba(74, 222, 128, 0.6);
  }
}

/* 超频脉冲独立背景 Canvas 图层 */
.overclock-bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 36px;
  line-height: 1.65;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 50px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 860px;
  margin: 0 auto;
  padding: 24px;
  background: rgba(8, 26, 17, 0.65);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.stat-item {
  text-align: center;
}

.stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: #ffffff;
  display: block;
}

.stat-num span {
  color: var(--accent-cyan);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 50px;
}

.section-tag {
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
  display: inline-block;
}

.section-title {
  font-size: clamp(1.8rem, 3.2vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* Fixed header anchor offset */
.features-section,
.media-ai-section,
.pricing-section,
.reviews-section,
.faq-section,
.content-block,
[id] {
  scroll-margin-top: 80px;
}

/* Features Section (3 Cards) */
.features-section {
  padding: 80px 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon-wrapper {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(56, 189, 248, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  margin-bottom: 24px;
}

.feature-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.feature-tag-badge {
  font-size: 0.78rem;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
}

/* Streaming & AI Section */
.media-ai-section {
  padding: 80px 0;
  background: transparent;
}

.media-ai-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.media-ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
}

.media-ai-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.media-ai-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}

.icon-streaming {
  background: linear-gradient(135deg, #e11d48, #f43f5e);
}

.icon-ai {
  background: linear-gradient(135deg, #10b981, #06b6d4);
}

.media-ai-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
}

.media-ai-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.platform-badges {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 12px;
}

.platform-pill {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 500;
}

.platform-pill svg {
  flex-shrink: 0;
}

/* Pricing Table */
.pricing-section {
  padding: 80px 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 35px rgba(0, 0, 0, 0.4);
}

.pricing-card.featured {
  border-color: #4ade80;
  background: linear-gradient(180deg, rgba(14, 44, 28, 0.9) 0%, rgba(8, 26, 17, 0.92) 100%);
  box-shadow: 0 8px 30px rgba(74, 222, 128, 0.18);
}

.popular-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-gradient);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.pricing-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
  margin-bottom: 24px;
  text-align: center;
}

.plan-name {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.plan-price {
  font-size: 2.5rem;
  font-weight: 800;
  color: #ffffff;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}

.price-currency {
  font-size: 1.25rem;
  color: var(--accent-cyan);
}

.price-cycle {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.plan-features {
  flex-grow: 1;
  margin-bottom: 28px;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.plan-features li.active {
  color: var(--text-primary);
}

.plan-features svg {
  color: #22c55e;
  flex-shrink: 0;
}

/* Testimonials / User Reviews */
.reviews-section {
  padding: 80px 0;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-stars {
  display: flex;
  gap: 4px;
  color: #fbbf24;
  margin-bottom: 16px;
}

.review-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 20px;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

.user-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
  font-size: 0.9rem;
}

.user-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.user-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* FAQ Section (Accordion with pure HTML details/summary) */
.faq-section {
  padding: 80px 0;
}

.faq-container {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--border-highlight);
}

.faq-item[open] {
  border-color: rgba(56, 189, 248, 0.4);
  background: var(--bg-card-hover);
}

.faq-question {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
}

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

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--accent-cyan);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 22px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 14px;
}

/* Call to Action Banner */
.cta-banner-section {
  padding: 70px 0;
}

.cta-banner {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.16) 0%, rgba(16, 185, 129, 0.16) 100%);
  border: 1px solid rgba(74, 222, 128, 0.3);
  border-radius: var(--radius-lg);
  padding: 55px 30px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-banner p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto 30px;
}

/* Footer (Strictly 4 links opening in new tab) */
.footer {
  background-color: #020604;
  border-top: 1px solid var(--border-color);
  padding: 45px 0 35px;
  text-align: center;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.footer-nav a:hover {
  color: var(--accent-cyan);
  background-color: rgba(255, 255, 255, 0.04);
}

.footer-copyright {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Subpage styling for about, terms, privacy, sitemap */
.subpage-header {
  padding: 60px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  background: radial-gradient(circle at 50% 0%, rgba(74, 222, 128, 0.08) 0%, transparent 70%);
}

.subpage-content {
  padding: 60px 0 80px;
  max-width: 860px;
  margin: 0 auto;
}

.content-block {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  margin-bottom: 28px;
}

.content-block h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  gap: 10px;
}

.content-block p {
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 14px;
}

.content-block ul {
  list-style: disc;
  padding-left: 20px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 14px;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .feature-grid,
  .pricing-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .media-ai-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .navbar .nav-container {
    flex-wrap: wrap;
    gap: 10px;
  }

  .nav-links {
    display: flex;
    order: 3;
    width: 100%;
    overflow-x: auto;
    padding-top: 10px;
    gap: 14px;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    scrollbar-width: none;
  }

  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .nav-links a {
    font-size: 0.88rem;
    padding: 4px 6px;
    color: var(--text-secondary);
  }

  .hero-section {
    padding: 45px 0 35px;
  }

  .hero-cta {
    flex-direction: column;
    gap: 12px;
  }

  .hero-cta .btn {
    width: 100%;
  }

  .btn-sm {
    min-height: 44px;
    padding: 10px 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 20px;
  }

  .feature-grid,
  .pricing-grid,
  .reviews-grid {
    grid-template-columns: 1fr;
  }

  .footer-nav {
    flex-direction: column;
    gap: 14px;
  }

  .footer-nav a {
    display: block;
    width: 100%;
    text-align: center;
    padding: 10px;
  }

  .content-block {
    padding: 24px 20px;
  }
}

@media (max-width: 480px) {
  .hero-stats {
    grid-template-columns: 1fr;
  }

  .btn {
    width: 100%;
    min-height: 50px;
  }

  .seo-toc-box {
    padding: 20px 16px;
  }

  .seo-toc-list {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   SEO 文章与知识科普专栏排版样式
   ========================================================================== */
.seo-toc-box {
  background: var(--bg-card);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 30px;
  margin-bottom: 35px;
}

.seo-toc-box h3 {
  font-size: 1.25rem;
  color: var(--accent-cyan);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.seo-toc-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}

.seo-toc-list a {
  display: block;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.92rem;
  transition: var(--transition);
}

.seo-toc-list a:hover {
  background: rgba(74, 222, 128, 0.1);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateX(4px);
}

.seo-article {
  scroll-margin-top: 90px;
}

.seo-article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.seo-tag {
  background: rgba(74, 222, 128, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(74, 222, 128, 0.25);
  border-radius: var(--radius-full);
  padding: 2px 10px;
  font-size: 0.8rem;
  font-weight: 600;
}

.content-block h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #f0fdf4;
  margin: 22px 0 10px;
  position: relative;
  padding-left: 14px;
}

.content-block h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  bottom: 5px;
  width: 4px;
  background: var(--accent-gradient);
  border-radius: 2px;
}

/* 文章专属 FAQ 容器与内嵌折叠 */
.article-faq-box {
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px dashed rgba(74, 222, 128, 0.2);
}

.article-faq-title {
  font-size: 1.08rem;
  color: var(--accent-cyan);
  margin-bottom: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-faq-box .faq-item {
  margin-bottom: 12px;
}

.article-faq-box .faq-question {
  padding: 14px 18px;
  font-size: 0.98rem;
}

.article-faq-box .faq-answer {
  padding: 0 18px 16px;
  font-size: 0.92rem;
  line-height: 1.6;
}