/* ==========================================================================
   锦云 (Jinyun) - 瑞士国际主义极简风样式表 (Swiss Minimalist & Monolith)
   设计准则：大象无形 · 严谨网格 · 极致对比 · 工业级稳健与高级质感
   ========================================================================== */

:root {
  /* 瑞士极简基础色阶：深邃碳黑底色 + 高对比冷灰与纯白 */
  --bg-primary: #090a0f;
  --bg-secondary: #0f1118;
  --bg-card: rgba(16, 19, 28, 0.7);
  --bg-card-hover: rgba(24, 28, 42, 0.9);
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.22);
  --border-focus: rgba(59, 130, 246, 0.6);
  
  /* 克制的点睛色：国际克莱因蓝/高冷钴蓝 (Cobalt Blue) + 工业状态色 */
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-glow: rgba(37, 99, 235, 0.25);
  --secondary: #0284c7;
  --accent: #f43f5e;
  --accent-amber: #f59e0b;
  --success: #10b981;
  
  /* 层次严密的排版文本颜色 */
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  /* 现代无衬线与等宽字体族 (Neo-Grotesque & Monolith) */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  
  --container-max: 1200px;
  --header-height: 72px;
  
  /* 瑞士精密几何微圆角 (摒弃圆钝气泡感，突出工业结构感) */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  
  --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  -webkit-text-size-adjust: 100%;
}

body {
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  /* 瑞士精密工程网格背景 (Architectural Grid Pattern) */
  background-color: var(--bg-primary);
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    radial-gradient(circle at 50% 0%, rgba(37, 99, 235, 0.12) 0%, transparent 60%);
  background-size: 44px 44px, 44px 44px, 100% 100%;
  background-attachment: fixed;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* 容器与版块结构 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding: 88px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 56px auto;
}

/* 极简工学徽章 */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: #cbd5e1;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* 巨幅瑞士排版标题 */
.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  line-height: 1.2;
  color: #ffffff;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}

.section-subtitle {
  font-size: clamp(15px, 2vw, 17px);
  color: var(--text-muted);
  line-height: 1.7;
}

/* 纯粹渐变与高反差文字 */
.gradient-text {
  background: linear-gradient(180deg, #ffffff 40%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-accent {
  color: #38bdf8;
}

/* 按钮规范：纯粹对比度与扎实质感 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
  user-select: none;
  letter-spacing: -0.01em;
}

/* 主按钮：纯白高对比度 (Stripe/Vercel Monolith 核心标识) */
.btn-primary {
  background: #ffffff;
  color: #090a0f;
  border: 1px solid #ffffff;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
  background: #f1f5f9;
  border-color: #f1f5f9;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(255, 255, 255, 0.15);
}

/* 次级按钮：严谨深灰线框 */
.btn-secondary {
  background: rgba(255, 255, 255, 0.03);
  color: #e2e8f0;
  border: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-hover);
  color: #ffffff;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: #e2e8f0;
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border-hover);
  color: #ffffff;
}

.btn-lg {
  padding: 14px 30px;
  font-size: 15.5px;
}

/* ==========================================================================
   Navbar (导航栏)
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  background: rgba(9, 10, 15, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.navbar .nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.03em;
}

.logo-icon {
  width: 34px;
  height: 34px;
  background: #1e2433;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
}

.logo-text {
  font-size: 20px;
  font-weight: 800;
  color: #ffffff;
}

.brand-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 2px 6px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  color: #cbd5e1;
  border-radius: var(--radius-sm);
  margin-left: 2px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 26px;
  list-style: none;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
  position: relative;
  padding: 6px 0;
  letter-spacing: -0.01em;
}

.nav-link:hover {
  color: #ffffff;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: #ffffff;
  transition: width 0.2s ease;
  border-radius: 1px;
}

.nav-link:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  padding: 8px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-main);
}

.hamburger-btn span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: #ffffff;
  border-radius: 1px;
  transition: var(--transition);
}

/* ==========================================================================
   Hero Section (首屏横幅区)
   ========================================================================== */
.hero-section {
  padding-top: calc(var(--header-height) + 54px);
  padding-bottom: 84px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 260px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
  filter: blur(80px);
  z-index: -1;
  pointer-events: none;
}

/* 瑞士工业标签 */
.promo-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  color: #e2e8f0;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}

.badge-dot {
  width: 6px;
  height: 6px;
  background-color: #3b82f6;
  border-radius: 50%;
  box-shadow: 0 0 8px #3b82f6;
}

.hero-title {
  font-size: clamp(34px, 5.5vw, 60px);
  font-weight: 900;
  line-height: 1.12;
  margin-bottom: 24px;
  letter-spacing: -0.04em;
  color: #ffffff;
}

.hero-subtitle {
  font-size: clamp(15.5px, 2.2vw, 19px);
  color: var(--text-muted);
  max-width: 800px;
  margin: 0 auto 38px auto;
  line-height: 1.75;
  letter-spacing: -0.01em;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

/* 信任指标面板：严谨横向数据条 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  max-width: 900px;
  margin: 0 auto;
  background: var(--border-color); /* 网格细线 */
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.stat-item {
  background: rgba(14, 17, 24, 0.85);
  padding: 22px 16px;
  text-align: center;
  backdrop-filter: blur(8px);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 25px;
  font-weight: 700;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 12.5px;
  color: var(--text-dim);
  margin-top: 4px;
}

/* ==========================================================================
   Core Advantages (核心优势区)
   ========================================================================== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.advantage-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 34px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.advantage-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.card-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  margin-bottom: 20px;
}

.advantage-card:nth-child(2) .card-icon-wrapper,
.advantage-card:nth-child(3) .card-icon-wrapper {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border-color);
  color: #ffffff;
}

.card-title {
  font-size: 19px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.card-desc {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* 流媒体与 AI 支持图卡 */
.streaming-ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 38px;
  position: relative;
  overflow: hidden;
}

.streaming-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 36px;
  align-items: center;
}

.streaming-content h3 {
  font-size: 24px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
  letter-spacing: -0.03em;
}

.streaming-content p {
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.75;
  margin-bottom: 20px;
}

.feature-bullets {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.bullet-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: #cbd5e1;
}

.bullet-icon {
  color: #3b82f6;
  flex-shrink: 0;
}

.service-pills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.service-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  color: #e2e8f0;
  transition: var(--transition);
}

.service-pill:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border-hover);
}

.service-pill svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ==========================================================================
   Pricing Section (定价卡片区)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 34px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
}

/* 推荐方案：高冷工业精钢边框 */
.pricing-card.featured {
  background: rgba(20, 24, 36, 0.85);
  border: 1px solid #3b82f6;
  box-shadow: 0 0 0 1px #3b82f6, 0 16px 40px rgba(0, 0, 0, 0.4);
}

.popular-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: #3b82f6;
  color: #ffffff;
  padding: 3px 12px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.pricing-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 22px;
  margin-bottom: 22px;
}

.plan-tier {
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.plan-desc {
  font-size: 13.5px;
  color: var(--text-muted);
  min-height: 40px;
  line-height: 1.6;
}

.price-box {
  margin-top: 18px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-currency {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
}

.price-number {
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 800;
  color: #ffffff;
  line-height: 1;
  letter-spacing: -0.03em;
}

.price-period {
  font-size: 13.5px;
  color: var(--text-dim);
}

.traffic-highlight {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  margin-top: 14px;
}

.pricing-features {
  list-style: none;
  margin-bottom: 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13.5px;
  color: #cbd5e1;
  line-height: 1.5;
}

.feature-check {
  color: #3b82f6;
  flex-shrink: 0;
  margin-top: 2px;
}

.pricing-btn {
  width: 100%;
}

/* ==========================================================================
   Why Choose Section (深度特性区)
   ========================================================================== */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  align-items: center;
  margin-bottom: 64px;
}

.feature-row:last-child {
  margin-bottom: 0;
}

.feature-text h3 {
  font-size: 26px;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}

.feature-text p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 22px;
}

.feature-highlights {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: #e2e8f0;
  font-weight: 500;
}

.highlight-icon {
  width: 20px;
  height: 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 11px;
}

/* 视觉化数据面板 (Live Monitor) */
.data-panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 26px;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 14px;
  margin-bottom: 18px;
}

.panel-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  font-weight: 600;
  color: #10b981;
}

.status-pulse {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 8px #10b981;
}

.panel-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-dim);
  font-family: var(--font-mono);
  letter-spacing: 0.5px;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}

.metric-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 14px;
}

.metric-label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 6px;
  letter-spacing: 0.5px;
}

.metric-val {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: #ffffff;
  display: flex;
  align-items: baseline;
  gap: 4px;
  letter-spacing: -0.02em;
}

.metric-unit {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: normal;
}

.speed-meter {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}

.meter-header {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.meter-bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 3px;
  overflow: hidden;
}

.meter-fill {
  height: 100%;
  width: 96%;
  background: #3b82f6;
  border-radius: 3px;
}

/* 终端代码块 (Strict_No_Logs_Policy.sh) */
.terminal-block {
  background: #090b10;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 12.5px;
}

.terminal-header {
  background: #11141d;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}
.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.terminal-filename {
  color: var(--text-muted);
  font-size: 11px;
}

.terminal-body {
  padding: 16px 18px;
  line-height: 1.7;
  color: #cbd5e1;
  overflow-x: auto;
}

.t-prompt { color: #38bdf8; user-select: none; }
.t-cmd { color: #ffffff; font-weight: 600; }
.t-comment { color: #64748b; font-style: italic; }
.t-success { color: #34d399; }
.t-key { color: #94a3b8; }
.t-val { color: #e2e8f0; }

/* ==========================================================================
   Secondary CTA Section (底部转化区)
   ========================================================================== */
.secondary-cta-section {
  padding: 72px 0;
}

.cta-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 56px 36px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

.cta-box h2 {
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 14px;
  letter-spacing: -0.03em;
}

.cta-box p {
  font-size: clamp(14.5px, 2vw, 17px);
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto 32px auto;
  line-height: 1.7;
}

.cta-trust-items {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-top: 24px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-dim);
}

.cta-trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   Testimonials Marquee (用户评价跑马灯)
   ========================================================================== */
.marquee-wrapper {
  width: 100%;
  overflow: hidden;
  position: relative;
  padding: 16px 0;
  mask-image: linear-gradient(to right, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, #000 8%, #000 92%, transparent);
}

.marquee-track {
  display: flex;
  gap: 16px;
  width: max-content;
  animation: marquee 38s linear infinite;
}

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

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

.testimonial-card {
  width: 320px;
  flex-shrink: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

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

.stars {
  display: flex;
  gap: 3px;
  color: #f59e0b;
  margin-bottom: 12px;
  font-size: 13px;
}

.testimonial-quote {
  font-size: 13.5px;
  color: #cbd5e1;
  line-height: 1.65;
  margin-bottom: 18px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 10px;
}

.author-avatar {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: #1e2433;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
  font-size: 13px;
  font-family: var(--font-mono);
}

.author-info h4 {
  font-size: 14px;
  font-weight: 600;
  color: #ffffff;
}

.author-info span {
  font-size: 11.5px;
  color: var(--text-dim);
}

/* ==========================================================================
   FAQ Section (折叠面板)
   ========================================================================== */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.faq-item[open] {
  border-color: var(--border-hover);
  background: rgba(20, 24, 36, 0.85);
}

.faq-summary {
  padding: 18px 22px;
  font-size: 15.5px;
  font-weight: 600;
  color: #ffffff;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  transition: color 0.2s;
  letter-spacing: -0.01em;
}

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

.faq-summary:hover {
  color: #38bdf8;
}

.faq-icon {
  width: 18px;
  height: 18px;
  transition: transform 0.25s ease;
  flex-shrink: 0;
  color: var(--text-muted);
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
  color: #38bdf8;
}

.faq-content {
  padding: 0 22px 20px 22px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 14px;
}

/* ==========================================================================
   Site Footer
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--border-color);
  background: #06070a;
  padding: 44px 0 32px 0;
  text-align: center;
}

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

.footer-link {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
  transition: var(--transition);
}

.footer-link:hover {
  color: #ffffff;
}

.footer-divider {
  width: 1px;
  height: 12px;
  background-color: var(--border-color);
}

.footer-copy {
  font-size: 13px;
  color: var(--text-dim);
}

/* ==========================================================================
   Documentation & Subpages (About, Terms, Privacy, Sitemap)
   ========================================================================== */
.doc-page {
  padding-top: calc(var(--header-height) + 36px);
  padding-bottom: 76px;
  max-width: 860px;
  margin: 0 auto;
}

.doc-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 44px;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
}

.doc-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 22px;
  margin-bottom: 28px;
}

.doc-title {
  font-size: 30px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
  letter-spacing: -0.03em;
}

.doc-meta {
  font-size: 13px;
  color: var(--text-dim);
}

.doc-section {
  margin-bottom: 32px;
}

.doc-section:last-child {
  margin-bottom: 0;
}

.doc-section h2 {
  font-size: 19px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.02em;
}

.doc-section h2::before {
  content: '';
  display: inline-block;
  width: 3px;
  height: 16px;
  background: #3b82f6;
  border-radius: 1px;
}

.doc-section p {
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.8;
  margin-bottom: 14px;
}

.doc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 10px;
}

.doc-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
}

.doc-list li::before {
  content: '–';
  color: #3b82f6;
  font-weight: bold;
}

/* ==========================================================================
   Article Hub & SEO News (news-8d3f.html)
   ========================================================================== */
.article-hub {
  padding-top: calc(var(--header-height) + 36px);
  padding-bottom: 76px;
}

.hub-hero {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 46px auto;
}

.hub-title {
  font-size: clamp(28px, 4.5vw, 42px);
  font-weight: 900;
  margin-bottom: 16px;
  line-height: 1.2;
  letter-spacing: -0.04em;
}

.hub-desc {
  font-size: 15.5px;
  color: var(--text-muted);
  line-height: 1.7;
}

.article-toc-nav {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 22px 24px;
  margin-bottom: 44px;
}

.article-toc-nav h3 {
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

@media (max-width: 768px) {
  .article-toc-list {
    grid-template-columns: 1fr;
  }
}

.article-toc-list a {
  font-size: 14px;
  color: #cbd5e1;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.article-toc-list a:hover {
  color: #38bdf8;
}

.article-entry {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 38px;
  margin-bottom: 40px;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
  transition: border-color 0.25s;
}

.article-entry:hover {
  border-color: var(--border-hover);
}

.article-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 22px;
  margin-bottom: 24px;
}

.article-tag {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: #cbd5e1;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.article-title {
  font-size: clamp(21px, 3.2vw, 29px);
  font-weight: 800;
  color: #ffffff;
  line-height: 1.35;
  margin-bottom: 14px;
  letter-spacing: -0.03em;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-dim);
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.article-content {
  font-size: 15px;
  line-height: 1.85;
  color: #cbd5e1;
}

.article-content h3 {
  font-size: 19px;
  font-weight: 700;
  color: #ffffff;
  margin: 26px 0 12px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.02em;
}

.article-content h3::before {
  content: '';
  display: inline-block;
  width: 3px;
  height: 16px;
  background: #3b82f6;
  border-radius: 1px;
}

.article-content h4 {
  font-size: 16.5px;
  font-weight: 600;
  color: #e2e8f0;
  margin: 18px 0 8px 0;
}

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

.article-content ul, .article-content ol {
  margin: 12px 0 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.article-content li {
  line-height: 1.7;
}

.article-content blockquote {
  border-left: 3px solid #3b82f6;
  background: rgba(255, 255, 255, 0.025);
  padding: 14px 18px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 18px 0;
  color: #cbd5e1;
}

.article-table-wrapper {
  overflow-x: auto;
  margin: 22px 0;
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  text-align: left;
}

.article-table th {
  background: rgba(255, 255, 255, 0.04);
  padding: 10px 14px;
  color: #ffffff;
  font-weight: 700;
  border-bottom: 1px solid var(--border-color);
}

.article-table td {
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
}

.article-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
  color: #ffffff;
}

.seo-link {
  color: #38bdf8;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s;
}

.seo-link:hover {
  color: #60a5fa;
}

.article-cta-box {
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  margin-top: 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.article-cta-text h5 {
  font-size: 15.5px;
  color: #ffffff;
  margin-bottom: 4px;
}

.article-cta-text p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* ==========================================================================
   Responsive Breakpoints (@media)
   ========================================================================== */
@media (max-width: 1024px) {
  .cards-grid,
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .streaming-inner {
    grid-template-columns: 1fr;
  }
  
  .feature-row {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: rgba(9, 10, 15, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 20px;
    gap: 16px;
    display: none;
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.5);
  }

  .nav-menu.active {
    display: flex;
  }

  .hamburger-btn {
    display: flex;
  }

  .nav-actions .btn-secondary {
    display: none;
  }

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

  .service-pills-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .metrics-grid {
    grid-template-columns: 1fr;
  }

  .hero-section {
    padding-top: calc(var(--header-height) + 24px);
    padding-bottom: 56px;
  }

  .hero-stats {
    grid-template-columns: 1fr 1fr;
  }

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

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

  .cta-box {
    padding: 36px 18px;
  }

  .doc-card {
    padding: 24px 18px;
  }
  
  .footer-nav {
    flex-direction: column;
    gap: 14px;
  }
  
  .footer-divider {
    display: none;
  }
}