/* ===================================================================
   Tolink加速器 - 官方推广落地页极简样式系统 (纯原生 CSS，零外部依赖)
   =================================================================== */

:root {
  --bg-primary: #0B0F14;
  --bg-secondary: #121820;
  --bg-card: rgba(16, 22, 30, 0.78);
  --bg-card-hover: rgba(26, 34, 46, 0.92);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(250, 204, 21, 0.4);
  
  --text-main: #FAFAFA;
  --text-muted: #A1A1AA;
  --text-dim: #9CA3AF; /* 优化对比度，确保与背景达 5.3:1 (标准 >= 4.5:1) */
  
  --primary: #FACC15;
  --primary-gradient: linear-gradient(135deg, #FACC15 0%, #FEF08A 100%);
  --accent-purple: #EAB308;
  --accent-gradient: linear-gradient(135deg, #FACC15 0%, #F59E0B 100%);
  --hot-gradient: linear-gradient(135deg, #FACC15 0%, #F97316 100%);
  
  --success: #FACC15;
  --warning: #F59E0B;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-glow: 0 0 25px rgba(250, 204, 21, 0.28);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.7);
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* 键盘可访问性：高亮外轮廓焦点样式 */
:focus-visible {
  outline: 2px solid #FACC15;
  outline-offset: 3px;
}

/* 跳过导航快速通道 (键盘访问无障碍) */
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background: #FACC15;
  color: #0B0F14;
  padding: 12px 20px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  z-index: 9999;
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 20px;
  outline: 3px solid #FFFFFF;
  box-shadow: 0 0 20px rgba(250, 204, 21, 0.8);
}

/* 固定页眉防遮挡锚点偏移 */
section[id], [id^="features"], [id^="unlock"], [id^="pricing"], [id^="reviews"], [id^="faq"], main[id] {
  scroll-margin-top: 80px;
}

/* 动画减弱无障碍支持 (prefers-reduced-motion) */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  #electric-canvas {
    display: none !important;
  }
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-family);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, #151d36 0%, #0a0d14 70%);
  background-attachment: fixed;
}

/* 容器与通用排版 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

img, svg {
  vertical-align: middle;
}

.text-gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.25);
  border-radius: var(--radius-full);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 60px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  line-height: 1.25;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* 按钮通用样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 600;
  font-size: 1rem;
  padding: 13px 26px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  min-height: 48px;
  text-align: center;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #070a12;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(0, 242, 254, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 242, 254, 0.55);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
  min-height: 40px;
}

.btn-block {
  width: 100%;
}

/* ===================================================================
   导航栏 Header
   =================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 13, 20, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

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

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
}

.logo-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--primary-gradient);
  color: #0a0d14;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 30px;
  align-items: center;
}

.nav-link {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
}

.nav-link:hover {
  color: var(--primary);
}

/* ===================================================================
   主视觉区 Hero Section
   =================================================================== */
.hero-section {
  padding: 90px 0 70px;
  text-align: center;
  position: relative;
}

.hero-content {
  max-width: 860px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 38px;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-tags {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  padding-top: 10px;
}

.hero-tag-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.hero-tag-item svg {
  color: var(--success);
}

/* 视觉控制台卡片（仪表盘预览效果） */
.hero-visual {
  margin-top: 60px;
  background: linear-gradient(180deg, rgba(20, 26, 42, 0.9) 0%, rgba(13, 17, 28, 0.95) 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-glow), var(--shadow-card);
  text-align: left;
}

.visual-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.visual-dots {
  display: flex;
  gap: 8px;
}

.visual-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }

.visual-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--success);
  font-weight: 600;
}

.status-indicator {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--success);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { opacity: 0.4; }
  50% { opacity: 1; }
  100% { opacity: 0.4; }
}

.visual-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.metric-item {
  background: rgba(255, 255, 255, 0.03);
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.metric-label {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.metric-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

/* ===================================================================
   产品核心优势介绍 (3个核心图文卡片)
   =================================================================== */
.features-section {
  padding: 90px 0;
}

.features-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 30px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: var(--border-highlight);
  box-shadow: 0 15px 35px -10px rgba(0, 242, 254, 0.15);
}

.feature-icon-wrapper {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: rgba(0, 242, 254, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--primary);
  border: 1px solid rgba(0, 242, 254, 0.2);
}

.feature-card-num {
  position: absolute;
  top: 24px;
  right: 28px;
  font-size: 1.8rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.05);
}

.feature-card-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-main);
}

.feature-card-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.feature-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

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

/* ===================================================================
   流媒体与 AI 支持图卡 Section
   =================================================================== */
.unlock-section {
  padding: 90px 0;
  background: rgba(16, 21, 34, 0.5);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.unlock-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.unlock-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.unlock-card:hover {
  border-color: rgba(0, 242, 254, 0.35);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
}

.unlock-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.unlock-icon-badge {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
}

.badge-ai { background: rgba(121, 40, 202, 0.2); color: #c084fc; border: 1px solid rgba(121, 40, 202, 0.4); }
.badge-media { background: rgba(239, 68, 68, 0.2); color: #f87171; border: 1px solid rgba(239, 68, 68, 0.4); }
.badge-stream { background: rgba(0, 242, 254, 0.2); color: #00f2fe; border: 1px solid rgba(0, 242, 254, 0.4); }
.badge-game { background: rgba(16, 185, 129, 0.2); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.4); }

.unlock-status {
  font-size: 0.75rem;
  color: var(--success);
  background: rgba(16, 185, 129, 0.1);
  padding: 3px 8px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.unlock-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.unlock-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 14px;
}

.unlock-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}

.unlock-tag {
  font-size: 0.75rem;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.04);
  padding: 2px 8px;
  border-radius: 4px;
}

/* ===================================================================
   清晰的套餐价格对比表 (Pricing)
   =================================================================== */
.pricing-section {
  padding: 90px 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: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 255, 255, 0.2);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(20, 32, 60, 0.95) 0%, rgba(13, 20, 38, 0.98) 100%);
  border: 2px solid #00f2fe;
  box-shadow: 0 0 35px rgba(0, 242, 254, 0.25);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gradient);
  color: #070a12;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  box-shadow: 0 4px 15px rgba(0, 242, 254, 0.4);
}

.pricing-name {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.pricing-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  min-height: 42px;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 28px;
}

.price-currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
}

.price-amount {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-main);
}

.price-period {
  font-size: 0.9rem;
  color: var(--text-dim);
}

.pricing-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.pricing-features li svg {
  color: var(--primary);
  flex-shrink: 0;
}

/* ===================================================================
   用户真实评价 (Testimonials)
   =================================================================== */
.reviews-section {
  padding: 90px 0;
  background: rgba(16, 21, 34, 0.4);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.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-md);
  padding: 30px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.15);
}

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

.review-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 22px;
  flex-grow: 1;
  font-style: italic;
}

.reviewer-meta {
  display: flex;
  align-items: center;
  gap: 14px;
}

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: #070a12;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.reviewer-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.reviewer-title {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ===================================================================
   常见问题解答 (FAQ - 6个问题，纯 HTML/CSS 交互零JS)
   =================================================================== */
.faq-section {
  padding: 90px 0;
}

.faq-list {
  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: rgba(0, 242, 254, 0.3);
}

.faq-item[open] {
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
}

.faq-summary {
  list-style: none;
  padding: 22px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
  user-select: none;
  transition: var(--transition);
}

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

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

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

.faq-answer {
  padding: 0 26px 24px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 16px;
}

/* ===================================================================
   转化呼吁区 (CTA Banner)
   =================================================================== */
.cta-banner-section {
  padding: 70px 0 90px;
}

.cta-banner {
  background: linear-gradient(135deg, rgba(20, 26, 42, 0.95) 0%, rgba(10, 30, 60, 0.9) 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  box-shadow: var(--shadow-glow);
  position: relative;
  overflow: hidden;
}

.cta-banner-title {
  font-size: 2.3rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-banner-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 32px;
}

/* ===================================================================
   页脚 Footer (严格遵循：只保留四个标题，打开新页面)
   =================================================================== */
.site-footer {
  border-top: 1px solid var(--border-color);
  background: #07090f;
  padding: 50px 0 40px;
  color: var(--text-muted);
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 36px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.footer-nav a {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.footer-nav a:hover {
  color: var(--primary);
  background: rgba(0, 242, 254, 0.08);
}

.footer-bottom {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-dim);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ===================================================================
   独立子页面样式 (关于我们/条款/隐私/地图 共用)
   =================================================================== */
.page-container {
  max-width: 860px;
  margin: 60px auto 100px;
  padding: 0 24px;
}

.page-header {
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
}

.page-title {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.page-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
}

.page-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  margin-bottom: 30px;
}

.page-card h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-card p {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

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

.page-list {
  list-style: none;
  margin-top: 12px;
}

.page-list li {
  position: relative;
  padding-left: 24px;
  color: var(--text-muted);
  margin-bottom: 10px;
  line-height: 1.6;
}

.page-list li::before {
  content: "•";
  position: absolute;
  left: 8px;
  color: var(--primary);
  font-weight: bold;
}

.badge-forbidden {
  display: inline-block;
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-right: 6px;
}

/* 知识科普与文章阅读组件样式 */
.wiki-article {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-bottom: 30px;
}

.wiki-toc {
  background: rgba(0, 242, 254, 0.04);
  border: 1px solid rgba(0, 242, 254, 0.2);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 36px;
}

.wiki-toc-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.wiki-toc-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px 20px;
}

.wiki-toc-list li a {
  font-size: 0.92rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.wiki-toc-list li a:hover {
  color: var(--primary);
}

.wiki-callout {
  background: rgba(255, 255, 255, 0.03);
  border-left: 4px solid var(--primary);
  padding: 18px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0;
  font-size: 0.93rem;
  color: var(--text-muted);
}

.wiki-callout strong {
  color: var(--text-main);
}

.hero-intro-box {
  background: rgba(20, 26, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-md);
  padding: 20px 28px;
  max-width: 780px;
  margin: 0 auto 34px;
  text-align: left;
}

.hero-intro-box p {
  font-size: 0.96rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 8px;
}

.hero-intro-box p:last-child {
  margin-bottom: 0;
}

/* ===================================================================
   SEO 深度专栏与文章组件
   =================================================================== */
.seo-article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px;
  margin-bottom: 34px;
  transition: var(--transition);
  position: relative;
  backdrop-filter: blur(12px);
}

.seo-article-card:hover {
  border-color: var(--border-highlight);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.seo-article-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 20px;
  margin-bottom: 24px;
}

.seo-article-title {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.35;
  margin-bottom: 14px;
}

.seo-meta-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.seo-meta-item {
  display: flex;
  align-items: center;
  gap: 5px;
}

.seo-meta-item svg {
  color: var(--primary);
}

.seo-tag-pill {
  background: rgba(250, 204, 21, 0.1);
  color: var(--primary);
  border: 1px solid rgba(250, 204, 21, 0.2);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 0.76rem;
  font-weight: 600;
}

.seo-article-body {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.8;
}

.seo-article-body h3 {
  font-size: 1.22rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 22px 0 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.seo-article-body p {
  margin-bottom: 16px;
}

.seo-article-body strong {
  color: var(--text-main);
}

.seo-internal-link {
  color: var(--primary);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
  padding: 2px 6px;
  background: rgba(250, 204, 21, 0.08);
  border-radius: 4px;
  transition: var(--transition);
}

.seo-internal-link:hover {
  background: rgba(250, 204, 21, 0.2);
  color: #fff;
  text-shadow: 0 0 10px var(--primary);
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(26, 34, 46, 0.8) 0%, rgba(16, 22, 30, 0.9) 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-top: 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.article-cta-text {
  font-size: 0.95rem;
  color: var(--text-main);
}

.article-cta-text strong {
  color: var(--primary);
}

/* ===================================================================
   文章内置专属 FAQ 模块与 SEO 内链关联组件
   =================================================================== */
.article-faq-wrap {
  margin: 28px 0 20px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(250, 204, 21, 0.2);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 22px 24px;
}

.article-faq-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-faq-item {
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.article-faq-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.article-faq-q {
  font-weight: 700;
  color: var(--text-main);
  font-size: 0.98rem;
  margin-bottom: 6px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.article-faq-q span {
  color: var(--primary);
  font-weight: 800;
}

.article-faq-a {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.65;
  padding-left: 24px;
}

.article-related-links {
  background: rgba(250, 204, 21, 0.04);
  border: 1px solid rgba(250, 204, 21, 0.15);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin: 24px 0 10px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.88rem;
}

.article-related-title {
  color: var(--text-main);
  font-weight: 700;
  margin-right: 4px;
}

/* ===================================================================
   知识科普 3x3 板块网格布局与沉浸式阅读器组件
   =================================================================== */
.blocks-3x3-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 50px;
}

.block-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
  text-align: left;
}

.block-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary);
  box-shadow: 0 12px 32px rgba(250, 204, 21, 0.16);
  background: var(--bg-card-hover);
}

.block-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.block-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: rgba(250, 204, 21, 0.12);
  color: var(--primary);
  border: 1px solid rgba(250, 204, 21, 0.25);
  letter-spacing: 0.04em;
}

.block-meta-count {
  font-size: 0.78rem;
  color: var(--text-dim);
  font-family: var(--font-number, monospace);
  font-weight: 600;
}

.block-card-title {
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.45;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 52px;
  transition: var(--transition);
}

.block-card:hover .block-card-title {
  color: var(--primary);
}

.block-card-excerpt {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex-grow: 1;
}

.block-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 14px;
  margin-top: auto;
}

.block-btn-view {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.block-card:hover .block-btn-view {
  gap: 10px;
  color: #fff;
}

/* 全文阅读器 Modal / 遮罩 */
.reader-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(8, 11, 16, 0.88);
  backdrop-filter: blur(14px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.reader-modal-overlay.active {
  display: flex;
  opacity: 1;
}

.reader-modal-box {
  background: #0F141C;
  border: 1px solid rgba(250, 204, 21, 0.3);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 880px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8), 0 0 35px rgba(250, 204, 21, 0.25);
  padding: 40px;
  position: relative;
  scrollbar-width: thin;
  scrollbar-color: var(--primary) transparent;
}

.reader-modal-box::-webkit-scrollbar {
  width: 6px;
}

.reader-modal-box::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 4px;
}

.reader-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: -40px;
  background: #0F141C;
  z-index: 10;
  margin-top: -10px;
  padding-top: 10px;
}

.btn-reader-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn-reader-back:hover {
  background: rgba(250, 204, 21, 0.15);
  border-color: var(--primary);
  color: var(--primary);
}

.btn-reader-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.6rem;
  cursor: pointer;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: var(--transition);
}

.btn-reader-close:hover {
  color: var(--primary);
  background: rgba(255, 255, 255, 0.08);
}

.reader-nav-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: 12px;
}

/* ===================================================================
   响应式媒体查询适配 (@media)
   =================================================================== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.8rem;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .unlock-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .wiki-toc-list {
    grid-template-columns: 1fr;
  }
  .blocks-3x3-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .blocks-3x3-grid {
    grid-template-columns: 1fr;
  }
  .reader-modal-box {
    padding: 24px 18px;
  }
  .site-header {
    padding: 10px 0;
  }

  .nav-container {
    flex-wrap: wrap;
    gap: 12px;
  }

  .nav-menu {
    display: flex;
    order: 3;
    width: 100%;
    overflow-x: auto;
    white-space: nowrap;
    padding-bottom: 4px;
    gap: 10px;
    -webkit-overflow-scrolling: touch;
  }

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

  .nav-link {
    font-size: 0.85rem;
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-full);
    display: inline-block;
  }

  .nav-link:hover, .nav-link.active {
    background: rgba(0, 242, 254, 0.15);
    color: var(--primary);
  }

  .hero-section {
    padding: 40px 0 35px;
  }

  .hero-title {
    font-size: 2.15rem;
    line-height: 1.2;
  }

  .hero-subtitle {
    font-size: 1.02rem;
    margin-bottom: 24px;
  }

  .hero-intro-box {
    padding: 16px;
    margin-bottom: 26px;
  }

  .hero-intro-box p {
    font-size: 0.9rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
    min-height: 52px;
    font-size: 1.05rem;
  }

  .hero-tags {
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }

  .visual-metrics {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .section-desc {
    font-size: 0.95rem;
  }

  /* 核心优势、流媒体解锁、价格、评价全部完美单栏流动排版 */
  .features-grid,
  .unlock-grid,
  .pricing-grid,
  .reviews-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .pricing-card {
    padding: 30px 22px;
  }

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

  .footer-nav {
    flex-direction: column;
    gap: 16px;
  }

  .page-container {
    margin: 30px auto 60px;
  }

  .page-title {
    font-size: 1.8rem;
  }

  .page-card, .wiki-article {
    padding: 24px 18px;
  }
}