/* ==========================================================================
   锦云 (JinYun) - 新中式赛博风 (Neo-Chinese Cyber Tech) 样式表
   设计理念: 墨黑玄夜为底，雨过天青 (霁蓝/电光青) 与金丝织锦 (鎏金) 辉映
   特性: 纯原生 CSS，零外部依赖，极速秒开，全端自适应响应式
   ========================================================================== */

/* 1. CSS 变量与设计规范 */
:root {
  /* 墨黑与玄青基础色调 */
  --bg-primary: #060911;
  --bg-secondary: #0c1220;
  --bg-card: rgba(14, 21, 37, 0.82);
  --bg-card-hover: rgba(20, 31, 54, 0.92);
  --bg-glass: rgba(56, 189, 248, 0.03);
  --border-color: rgba(56, 189, 248, 0.12);
  --border-hover: rgba(245, 158, 11, 0.5);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  /* 新中式赛博专属光谱 */
  --accent-cyan: #06b6d4;      /* 雨过天青 / 霁蓝电光 */
  --accent-gold: #f59e0b;      /* 织锦赤金 / 鎏金 */
  --accent-gold-light: #fbbf24;
  --accent-indigo: #6366f1;    /* 远山黛紫 */
  --accent-green: #10b981;     /* 墨玉青翠 */
  --accent-rose: #f43f5e;

  /* 品牌渐变: 天青 - 黛紫 - 鎏金 */
  --gradient-brand: linear-gradient(135deg, #38bdf8 0%, #818cf8 48%, #fbbf24 100%);
  --gradient-gold: linear-gradient(135deg, #f59e0b 0%, #fbbf24 50%, #d97706 100%);
  --gradient-btn: linear-gradient(135deg, #0284c7 0%, #2563eb 55%, #d97706 100%);
  --gradient-btn-hover: linear-gradient(135deg, #0369a1 0%, #1d4ed8 55%, #b45309 100%);
  --gradient-glow: radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.15) 0%, transparent 70%);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-card: 0 12px 35px -10px rgba(0, 0, 0, 0.65);
  --shadow-glow: 0 0 35px -5px rgba(6, 182, 212, 0.35);
  --shadow-gold: 0 0 30px -5px rgba(245, 158, 11, 0.35);

  --max-width: 1200px;
  --nav-height: 72px;
}

/* 2. 重置与基础设置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 50% -10%, rgba(14, 165, 233, 0.16) 0%, transparent 55%),
    radial-gradient(circle at 85% 25%, rgba(245, 158, 11, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 15% 70%, rgba(56, 189, 248, 0.09) 0%, transparent 45%),
    radial-gradient(circle at 80% 85%, rgba(99, 102, 241, 0.08) 0%, transparent 50%);
  background-attachment: fixed;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
}

ul {
  list-style: none;
}

img, svg {
  display: inline-block;
  vertical-align: middle;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* 3. 按钮系统与通用组件 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  text-align: center;
  white-space: nowrap;
  min-height: 44px;
}

.btn-primary {
  background: var(--gradient-btn);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.4), 0 0 15px rgba(245, 158, 11, 0.2);
  border: 1px solid rgba(245, 158, 11, 0.35);
}

.btn-primary:hover {
  background: var(--gradient-btn-hover);
  box-shadow: 0 6px 28px rgba(14, 165, 233, 0.55), 0 0 20px rgba(245, 158, 11, 0.35);
  border-color: var(--accent-gold-light);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(14, 21, 37, 0.7);
  color: var(--text-main);
  border: 1px solid rgba(56, 189, 248, 0.2);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(20, 31, 54, 0.9);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.25);
  transform: translateY(-2px);
  color: #fff;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.875rem;
  min-height: 36px;
}

.btn-lg {
  padding: 16px 38px;
  font-size: 1.1rem;
  border-radius: var(--radius-full);
}

.btn-block {
  width: 100%;
}

/* 4. 标题与排版工具 */
.section {
  padding: 90px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-gold-light);
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.35);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  box-shadow: 0 0 15px rgba(245, 158, 11, 0.12);
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
}

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

/* 5. 导航栏 (Navbar) */
.navbar {
  position: sticky;
  top: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(6, 9, 17, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.3s, border-color 0.3s;
}

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

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.45rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.5px;
}

.nav-brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.2), rgba(245, 158, 11, 0.25));
  border: 1px solid rgba(245, 158, 11, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-gold-light);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.3), 0 0 10px rgba(245, 158, 11, 0.2);
}

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

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 6px 0;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-cyan);
  transition: width 0.25s ease;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-mobile-actions {
  display: none;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
}

/* 6. 首屏横幅区 (Hero Section) */
.hero {
  padding: 80px 0 90px;
  text-align: center;
  position: relative;
}

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

.promo-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.35);
  color: #fcd34d;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.15);
  animation: pulse-glow 2.5s infinite ease-in-out;
}

@keyframes pulse-glow {
  0%, 100% {
    box-shadow: 0 0 15px rgba(245, 158, 11, 0.15);
  }
  50% {
    box-shadow: 0 0 25px rgba(245, 158, 11, 0.35);
  }
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 900;
  line-height: 1.18;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 40px;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.hero-stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero-stat-value {
  font-size: 1.85rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}

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

/* 7. 核心优势图卡区 (Dynamic Cards Section) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 36px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: 0 15px 35px -5px rgba(59, 130, 246, 0.25);
  background: var(--bg-card-hover);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-brand);
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

.feature-icon-wrapper {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  margin-bottom: 22px;
}

.feature-card:nth-child(2) .feature-icon-wrapper {
  background: rgba(139, 92, 246, 0.12);
  border-color: rgba(139, 92, 246, 0.3);
  color: var(--accent-purple);
}

.feature-card:nth-child(3) .feature-icon-wrapper {
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.3);
  color: var(--accent-green);
}

.feature-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 流媒体与 AI 支持大卡片 */
.streaming-card {
  background: linear-gradient(135deg, rgba(17, 24, 39, 0.8), rgba(28, 38, 60, 0.6));
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: var(--radius-lg);
  padding: 40px;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.streaming-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 28px;
}

.streaming-title-group h3 {
  font-size: 1.6rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 6px;
}

.streaming-title-group p {
  color: var(--text-muted);
  font-size: 1rem;
}

.streaming-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #34d399;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: var(--radius-full);
}

.streaming-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #34d399;
  box-shadow: 0 0 10px #34d399;
}

.streaming-services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.service-pill {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  padding: 14px 18px;
  border-radius: var(--radius-md);
  transition: all 0.25s ease;
}

.service-pill:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(59, 130, 246, 0.4);
  transform: translateY(-2px);
}

.service-icon {
  font-size: 1.4rem;
  width: 32px;
  text-align: center;
}

.service-info {
  display: flex;
  flex-direction: column;
}

.service-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: #fff;
}

.service-tag {
  font-size: 0.75rem;
  color: var(--accent-cyan);
}

/* 8. 定价卡片区 (Pricing Section) */
.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 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  backdrop-filter: blur(12px);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.6);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(16, 26, 48, 0.9) 0%, rgba(10, 16, 30, 0.96) 100%);
  border: 2px solid rgba(245, 158, 11, 0.65);
  box-shadow: 0 0 35px -5px rgba(245, 158, 11, 0.35), 0 0 50px -10px rgba(14, 165, 233, 0.25);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
  border-color: var(--accent-gold-light);
}

.pricing-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-gold);
  color: #080c14;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 1px;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 15px rgba(245, 158, 11, 0.5);
  text-transform: uppercase;
}

.pricing-header {
  margin-bottom: 24px;
}

.pricing-name {
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.pricing-traffic-badge {
  font-size: 0.8rem;
  padding: 4px 10px;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: var(--accent-cyan);
  border-radius: var(--radius-full);
  font-weight: 600;
}

.pricing-price-box {
  display: flex;
  align-items: baseline;
  margin: 16px 0 8px;
}

.pricing-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
  margin-right: 2px;
}

.pricing-amount {
  font-size: 2.8rem;
  font-weight: 900;
  color: #fff;
  line-height: 1;
}

.pricing-period {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-left: 6px;
}

.pricing-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  min-height: 44px;
}

.pricing-divider {
  height: 1px;
  background: var(--border-color);
  margin: 20px 0;
}

.pricing-features {
  flex-grow: 1;
  margin-bottom: 32px;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.pricing-feature-item svg {
  color: var(--accent-green);
  flex-shrink: 0;
}

.pricing-feature-item.highlight {
  color: #fff;
  font-weight: 600;
}

/* 9. 深度特性解析区 (Why Choose Section) */
.why-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 80px;
}

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

.why-content h3 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

.why-content p {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.why-features-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.why-feature-bullet {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-main);
}

.why-feature-bullet .bullet-icon {
  color: var(--accent-cyan);
  margin-top: 3px;
  flex-shrink: 0;
}

/* 仪表盘视觉组件 */
.dashboard-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
  margin-bottom: 24px;
}

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

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

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

.dashboard-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 24px;
}

.dash-metric {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px;
}

.metric-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.metric-value {
  font-size: 1.6rem;
  font-weight: 800;
  color: #fff;
}

.metric-sub {
  font-size: 0.75rem;
  color: var(--accent-cyan);
  margin-top: 4px;
}

.speed-meter-bar {
  background: rgba(255, 255, 255, 0.06);
  height: 10px;
  border-radius: 5px;
  overflow: hidden;
  margin-top: 10px;
}

.speed-meter-fill {
  height: 100%;
  width: 95%;
  background: var(--gradient-brand);
  border-radius: 5px;
}

/* 终端代码块组件 (Terminal Window) */
.terminal-window {
  background: #090d16;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.terminal-header {
  background: #111726;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
}

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

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

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

.terminal-title {
  margin: 0 auto;
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.terminal-body {
  padding: 24px;
  font-size: 0.88rem;
  line-height: 1.7;
  color: #cbd5e1;
  overflow-x: auto;
}

.code-comment { color: #64748b; }
.code-keyword { color: #f43f5e; font-weight: 600; }
.code-func { color: #38bdf8; }
.code-str { color: #a3e635; }
.code-success { color: #34d399; font-weight: 600; }
.code-cursor {
  display: inline-block;
  width: 8px;
  height: 15px;
  background-color: var(--accent-cyan);
  vertical-align: middle;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* 10. 用户评价跑马灯区 (Testimonials Marquee Section) */
.marquee-container {
  overflow: hidden;
  position: relative;
  width: 100%;
  padding: 20px 0;
  mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.marquee-track {
  display: flex;
  gap: 24px;
  width: max-content;
  animation: marquee-scroll 35s linear infinite;
}

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

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

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  width: 340px;
  flex-shrink: 0;
  backdrop-filter: blur(10px);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: rgba(59, 130, 246, 0.4);
}

.testimonial-stars {
  color: #fbbf24;
  margin-bottom: 12px;
  display: flex;
  gap: 3px;
}

.testimonial-text {
  font-size: 0.95rem;
  color: #e2e8f0;
  line-height: 1.6;
  margin-bottom: 18px;
}

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

.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
}

.testimonial-user-info {
  display: flex;
  flex-direction: column;
}

.testimonial-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: #fff;
}

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

/* 11. 常见问题解答区 (FAQ Section) */
.faq-accordion {
  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: border-color 0.25s ease, background-color 0.25s ease;
}

.faq-item[open] {
  border-color: rgba(59, 130, 246, 0.4);
  background: rgba(18, 24, 38, 0.9);
}

.faq-summary {
  padding: 20px 24px;
  font-size: 1.08rem;
  font-weight: 700;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
}

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

.faq-arrow {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
  color: var(--accent-cyan);
  flex-shrink: 0;
}

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

.faq-content {
  padding: 0 24px 22px;
  color: var(--text-muted);
  font-size: 0.96rem;
  line-height: 1.7;
}

/* 12. 底部转化区 (CTA Section) */
.bottom-cta {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.15), rgba(124, 58, 237, 0.15));
  border-top: 1px solid rgba(59, 130, 246, 0.2);
  border-bottom: 1px solid rgba(59, 130, 246, 0.2);
  padding: 85px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.bottom-cta-content {
  max-width: 760px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.bottom-cta-title {
  font-size: 2.6rem;
  font-weight: 900;
  margin-bottom: 18px;
  line-height: 1.25;
}

.bottom-cta-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 36px;
}

/* 13. 页脚 (Footer) */
.site-footer {
  background: #04060b;
  border-top: 1px solid var(--border-color);
  padding: 50px 0 40px;
  text-align: center;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-nav-link {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: color 0.25s ease;
}

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

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

/* 14. 移动端抽屉导航与响应式适配 */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.6rem;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .streaming-services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }
  .why-row {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: rgba(7, 10, 18, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
    gap: 18px;
  }

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

  .nav-toggle {
    display: block;
  }

  .nav-actions {
    display: none;
  }

  .nav-menu .nav-mobile-actions {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 12px;
    margin-top: 10px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
  }

  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.85rem;
  }

  .hero {
    padding: 50px 0 60px;
  }

  .hero-title {
    font-size: 2.1rem;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

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

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

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

  .streaming-services-grid {
    grid-template-columns: 1fr;
  }

  .streaming-card {
    padding: 24px;
  }

  .bottom-cta-title {
    font-size: 2rem;
  }

  .footer-nav {
    gap: 20px;
  }
}

/* 15. SEO 深度资讯与长文专区样式 */
.article-header-banner {
  padding: 50px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  background: radial-gradient(circle at 50% 20%, rgba(59, 130, 246, 0.12) 0%, transparent 60%);
}

.article-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
  margin-top: 40px;
  align-items: start;
}

.article-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + 20px);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  backdrop-filter: blur(12px);
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

.article-toc-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 10px;
}

.article-toc-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.article-toc-item a {
  display: block;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.article-toc-item a:hover {
  color: var(--accent-cyan);
  background: rgba(255, 255, 255, 0.05);
  transform: translateX(4px);
}

.article-feed {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.article-entry {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 44px;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  scroll-margin-top: calc(var(--nav-height) + 30px);
}

.article-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.3);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
}

.article-entry-title {
  font-size: 1.85rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.35;
  margin-bottom: 16px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.85rem;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.article-meta-bar span {
  display: flex;
  align-items: center;
  gap: 5px;
}

.article-body {
  color: #cbd5e1;
  font-size: 1.02rem;
  line-height: 1.85;
}

.article-body h2 {
  font-size: 1.45rem;
  font-weight: 800;
  color: #fff;
  margin: 32px 0 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-body h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 20px;
  background: var(--gradient-brand);
  border-radius: 2px;
}

.article-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #e2e8f0;
  margin: 22px 0 10px;
}

.article-body p {
  margin-bottom: 18px;
}

.article-body ul, .article-body ol {
  margin: 12px 0 20px 24px;
  line-height: 1.8;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body a {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.article-body a:hover {
  color: #38bdf8;
  text-shadow: 0 0 10px rgba(56, 189, 248, 0.4);
}

.article-table-wrap {
  overflow-x: auto;
  margin: 24px 0;
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  text-align: left;
}

.article-table th {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
}

.article-table td {
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
}

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

.article-callout {
  background: rgba(59, 130, 246, 0.08);
  border-left: 4px solid var(--accent-blue);
  padding: 18px 22px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 22px 0;
}

@media (max-width: 992px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
    max-height: none;
  }
  .article-entry {
    padding: 30px 20px;
  }
  .article-entry-title {
    font-size: 1.55rem;
  }
}