/* ===================================================================
   气泡云 (Bubble Cloud) 官方落地页样式表 - 极简纯原生 CSS
   特点：零外部依赖、秒开级渲染、全响应式适配、高转化视觉规范
   =================================================================== */

:root {
  --bg-primary: #080c14;
  --bg-secondary: #0e1524;
  --bg-card: rgba(18, 26, 43, 0.75);
  --bg-card-hover: rgba(26, 38, 62, 0.85);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-accent: rgba(0, 240, 255, 0.35);
  
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  
  --accent-cyan: #00f0ff;
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
  --accent-pink: #ec4899;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  
  --gradient-brand: linear-gradient(135deg, #00f0ff 0%, #3b82f6 50%, #8b5cf6 100%);
  --gradient-glow: radial-gradient(circle at 50% 30%, rgba(0, 240, 255, 0.15) 0%, rgba(139, 92, 246, 0.08) 40%, transparent 70%);
  
  --shadow-glow: 0 0 25px rgba(0, 240, 255, 0.25);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --transition-fast: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(at 10% 20%, rgba(0, 240, 255, 0.07) 0px, transparent 50%),
    radial-gradient(at 90% 80%, rgba(139, 92, 246, 0.07) 0px, transparent 50%);
  background-attachment: fixed;
}

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

img, svg {
  vertical-align: middle;
  max-width: 100%;
}

ul, ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* 渐变文本与高亮 */
.text-gradient {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  border: 1px solid rgba(0, 240, 255, 0.3);
  background: rgba(0, 240, 255, 0.1);
  color: var(--accent-cyan);
  backdrop-filter: blur(8px);
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition-fast);
  white-space: nowrap;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, #00f0ff 0%, #3b82f6 100%);
  color: #050811;
  box-shadow: 0 4px 20px rgba(0, 240, 255, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(0, 240, 255, 0.5);
  color: #000;
}

.btn-outline {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 15px 36px;
  font-size: 1.05rem;
  border-radius: 12px;
}

/* ===================================================================
   导航栏 (Navbar)
   =================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: background-color 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
  background: rgba(8, 12, 20, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.navbar .nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.5px;
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, #00f0ff, #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
}

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

.nav-links a {
  font-size: 0.92rem;
  color: var(--text-muted);
  font-weight: 500;
}

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

.nav-links .nav-news-link {
  color: var(--accent-cyan);
  position: relative;
  padding: 4px 8px;
  border-radius: 6px;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.2);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--text-main);
}

.mobile-toggle svg {
  width: 26px;
  height: 26px;
}

/* ===================================================================
   首屏横幅区 (Hero Section)
   =================================================================== */
.hero-section {
  padding-top: 150px;
  padding-bottom: 80px;
  position: relative;
  text-align: center;
  overflow: hidden;
}

.hero-glow-bg {
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 350px;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.15) 0%, rgba(139, 92, 246, 0.08) 50%, transparent 80%);
  filter: blur(70px);
  z-index: -1;
  pointer-events: none;
}

.hero-promo {
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 22px;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 780px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 45px;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 860px;
  margin: 0 auto;
  padding: 24px 30px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  backdrop-filter: blur(10px);
}

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

.stat-val {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-cyan);
  display: block;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ===================================================================
   板块公共标题
   =================================================================== */
.section-header {
  text-align: center;
  margin-bottom: 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: block;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto;
}

/* ===================================================================
   核心优势图卡区 (Dynamic Cards Section)
   =================================================================== */
.features-section {
  padding: 90px 0;
  position: relative;
}

.cards-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 30px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 32px 28px;
  position: relative;
  transition: var(--transition-fast);
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  background: var(--bg-card-hover);
}

.card-icon-wrap {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  background: rgba(0, 240, 255, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 240, 255, 0.2);
}

.card-title {
  font-size: 1.28rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
}

.card-text {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* 流媒体与AI支持横幅图卡 */
.unlock-showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.unlock-card {
  background: linear-gradient(145deg, rgba(18, 26, 43, 0.8), rgba(26, 35, 58, 0.5));
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 30px;
  position: relative;
  transition: var(--transition-fast);
}

.unlock-card:hover {
  border-color: rgba(139, 92, 246, 0.4);
  transform: translateY(-4px);
}

.unlock-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.unlock-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.unlock-badge {
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #e5e7eb;
}

/* ===================================================================
   定价卡片区 (Pricing Section)
   =================================================================== */
.pricing-section {
  padding: 90px 0;
  position: relative;
  background: linear-gradient(180deg, transparent 0%, rgba(14, 21, 36, 0.5) 50%, transparent 100%);
}

.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-subtle);
  border-radius: 20px;
  padding: 38px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-fast);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-accent);
  box-shadow: 0 15px 35px -10px rgba(0, 0, 0, 0.6);
}

.pricing-card.featured {
  background: linear-gradient(165deg, rgba(23, 34, 56, 0.95), rgba(15, 23, 39, 0.95));
  border: 2px solid var(--accent-cyan);
  box-shadow: 0 0 30px rgba(0, 240, 255, 0.2);
  transform: scale(1.03);
}

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

.featured-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #00f0ff, #3b82f6);
  color: #050811;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 4px 18px;
  border-radius: 9999px;
  box-shadow: 0 4px 12px rgba(0, 240, 255, 0.4);
  letter-spacing: 0.5px;
}

.plan-header {
  margin-bottom: 20px;
}

.plan-name {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.price-number {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  color: #fff;
}

.price-period {
  color: var(--text-dim);
  font-size: 0.95rem;
}

.traffic-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 22px;
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.25);
}

.plan-features {
  margin-bottom: 30px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: #d1d5db;
  margin-bottom: 12px;
}

.plan-features li svg {
  flex-shrink: 0;
  color: var(--accent-cyan);
}

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

/* ===================================================================
   深度特性解析区 (Why Choose Section)
   =================================================================== */
.why-section {
  padding: 90px 0;
}

.why-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
  margin-bottom: 80px;
}

.why-row.reverse {
  direction: rtl;
}

.why-row.reverse > * {
  direction: ltr;
}

.why-content h3 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 18px;
  line-height: 1.3;
}

.why-content p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 22px;
}

.why-feature-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  margin-bottom: 10px;
  color: #e5e7eb;
}

/* 视觉化动态数据面板 */
.data-panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 30px;
  box-shadow: var(--shadow-card);
}

.data-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 14px;
  margin-bottom: 20px;
}

.panel-title {
  font-weight: 700;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.live-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
  animation: pulse-dot 1.8s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.data-metrics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

.metric-box {
  background: rgba(0, 0, 0, 0.35);
  padding: 16px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.metric-title {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-bottom: 4px;
}

.metric-num {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--accent-cyan);
}

.speed-bar-wrap {
  margin-top: 14px;
}

.speed-bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.speed-bar-track {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 9999px;
  overflow: hidden;
}

.speed-bar-fill {
  height: 100%;
  width: 98.4%;
  background: linear-gradient(90deg, #3b82f6, #00f0ff);
  border-radius: 9999px;
}

/* 终端代码块样式 (Strict_No_Logs_Policy.sh) */
.terminal-window {
  background: #060911;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.7);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.terminal-header {
  background: #0f1422;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.terminal-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.terminal-title {
  margin-left: 10px;
  font-size: 0.8rem;
  color: #94a3b8;
}

.terminal-body {
  padding: 22px;
  font-size: 0.86rem;
  line-height: 1.7;
  color: #d1d5db;
  overflow-x: auto;
}

.t-prompt { color: #10b981; }
.t-cmd { color: #38bdf8; font-weight: 600; }
.t-comment { color: #64748b; font-style: italic; }
.t-highlight { color: #a855f7; }
.t-success { color: #34d399; font-weight: 600; }

/* ===================================================================
   用户评价跑马灯区 (Testimonials Marquee Section)
   =================================================================== */
.testimonials-section {
  padding: 80px 0;
  overflow: hidden;
  position: relative;
}

.marquee-container {
  width: 100%;
  overflow: hidden;
  position: relative;
  mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
}

.marquee-track {
  display: flex;
  gap: 22px;
  width: max-content;
  animation: marquee-scroll 38s linear infinite;
}

.marquee-track:hover {
  animation-play-state: paused;
}

@keyframes marquee-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.testimonial-card {
  width: 320px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 24px;
  flex-shrink: 0;
  transition: var(--transition-fast);
}

.testimonial-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
}

.stars {
  color: #f59e0b;
  font-size: 0.95rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.testimonial-text {
  font-size: 0.88rem;
  color: #d1d5db;
  line-height: 1.6;
  margin-bottom: 18px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b82f6, #00f0ff);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #050811;
  font-size: 0.9rem;
}

.author-info h4 {
  font-size: 0.92rem;
  font-weight: 700;
  color: #fff;
}

.author-info span {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ===================================================================
   常见问题解答区 (FAQ Section) - 原生 details/summary
   =================================================================== */
.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-subtle);
  border-radius: 14px;
  overflow: hidden;
  transition: var(--transition-fast);
}

.faq-item[open] {
  border-color: rgba(0, 240, 255, 0.3);
  background: var(--bg-card-hover);
}

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

.faq-summary::-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-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 16px;
}

/* ===================================================================
   底部转化区 (CTA Section)
   =================================================================== */
.cta-section {
  padding: 80px 0 100px;
}

.cta-banner {
  background: radial-gradient(circle at 50% 50%, rgba(20, 32, 58, 0.9) 0%, rgba(10, 15, 27, 0.95) 100%);
  border: 1px solid rgba(0, 240, 255, 0.3);
  box-shadow: 0 20px 50px -10px rgba(0, 240, 255, 0.15);
  border-radius: 24px;
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.cta-banner p {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto 34px;
}

.cta-banner .btn-group {
  display: flex;
  justify-content: center;
  gap: 16px;
}

/* ===================================================================
   页脚 (Footer) - 严格保留四个规定标题
   =================================================================== */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  background: #050811;
  padding: 40px 0;
  text-align: center;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 36px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
  transition: var(--transition-fast);
}

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

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

/* ===================================================================
   文章与子页面公共样式 (SEO 文章与关于/隐私/条款/地图)
   =================================================================== */
.page-hero {
  padding-top: 140px;
  padding-bottom: 40px;
  text-align: center;
  border-bottom: 1px solid var(--border-subtle);
  background: radial-gradient(circle at 50% 20%, rgba(0, 240, 255, 0.08) 0%, transparent 60%);
}

.article-content {
  padding: 50px 0 90px;
  max-width: 880px;
  margin: 0 auto;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 38px 42px;
  margin-bottom: 40px;
  transition: var(--transition-fast);
}

.article-card:hover {
  border-color: rgba(0, 240, 255, 0.25);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 14px;
}

.article-card h2 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: #fff;
  line-height: 1.4;
}

.article-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin: 24px 0 12px;
  color: var(--accent-cyan);
}

.article-card p {
  color: #d1d5db;
  font-size: 0.98rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.article-card ul, .article-card ol {
  margin: 14px 0 20px 20px;
  color: #9ca3af;
}

.article-card li {
  margin-bottom: 8px;
  line-height: 1.6;
}

.article-card ul { list-style: disc; }
.article-card ol { list-style: decimal; }

.article-card table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.9rem;
}

.article-card th, .article-card td {
  padding: 12px 14px;
  border: 1px solid var(--border-subtle);
  text-align: left;
}

.article-card th {
  background: rgba(0, 240, 255, 0.08);
  color: var(--accent-cyan);
  font-weight: 700;
}

.article-card blockquote {
  border-left: 4px solid var(--accent-cyan);
  background: rgba(0, 240, 255, 0.05);
  padding: 14px 20px;
  margin: 18px 0;
  border-radius: 0 8px 8px 0;
  color: #e5e7eb;
}

/* 博客外链专有高亮 (传递权重) */
.dofollow-link {
  color: var(--accent-cyan);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: var(--transition-fast);
}

.dofollow-link:hover {
  color: #fff;
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.6);
}

/* ===================================================================
   响应式媒体查询 (@media) - 确保手机端完美单栏与手指触摸体验
   =================================================================== */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.6rem;
  }
  
  .cards-grid-3,
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
  
  .unlock-showcase-grid {
    grid-template-columns: 1fr;
  }
  
  .why-row {
    grid-template-columns: 1fr;
    gap: 36px;
    margin-bottom: 60px;
  }
  
  .why-row.reverse {
    direction: ltr;
  }
  
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
}

@media (max-width: 768px) {
  .navbar .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(8, 12, 20, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px 20px;
    gap: 18px;
    border-bottom: 1px solid var(--border-subtle);
    transform: translateY(-150%);
    transition: transform 0.3s ease;
  }
  
  .navbar .nav-links.active {
    transform: translateY(0);
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .nav-actions {
    display: none;
  }
  
  .hero-section {
    padding-top: 120px;
    padding-bottom: 50px;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 0.98rem;
  }
  
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-cta-group .btn {
    width: 100%;
    min-height: 48px;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .cta-banner {
    padding: 40px 20px;
  }
  
  .cta-banner h2 {
    font-size: 1.8rem;
  }
  
  .cta-banner .btn-group {
    flex-direction: column;
  }
  
  .cta-banner .btn {
    width: 100%;
    min-height: 48px;
  }
  
  .footer-nav {
    gap: 20px;
  }
  
  .article-card {
    padding: 26px 20px;
  }
  
  .article-card h2 {
    font-size: 1.4rem;
  }
}

@media (max-width: 480px) {
  .hero-stats {
    grid-template-columns: 1fr;
    padding: 16px;
  }
  
  .stat-val {
    font-size: 1.5rem;
  }
}