/* ==========================================================================
   极客云 (Jike Cloud) - 极速全球网络加速器推广落地页专用原生样式表
   风格体系：1. 极光深空流光风 (Linear / Raycast Style)
   特性：零重型库依赖 · 极致秒开 · 纯CSS微米科技网格 · 极光微动效 · 全响应式
   ========================================================================== */

:root {
  /* 深空底色体系 (Linear Obsidian & Deep Navy) */
  --bg-dark: #06080f;
  --bg-surface: #0a0e1c;
  --bg-card: rgba(13, 19, 36, 0.68);
  --bg-card-hover: rgba(18, 26, 48, 0.85);
  --bg-card-featured: rgba(15, 22, 42, 0.92);
  --bg-glass: rgba(10, 14, 26, 0.72);

  /* 边框体系 (微米极细描边 + 内发光) */
  --border-subtle: rgba(255, 255, 255, 0.07);
  --border-light: rgba(255, 255, 255, 0.11);
  --border-highlight: rgba(0, 242, 254, 0.45);
  --border-purple: rgba(139, 92, 246, 0.45);

  /* 核心极光色彩 (Electric Cyan, Violet & Aurora Gradient) */
  --primary-cyan: #00f2fe;
  --primary-blue: #38bdf8;
  --primary-indigo: #6366f1;
  --primary-purple: #8b5cf6;
  --aurora-pink: #ec4899;
  --accent-green: #10b981;
  --accent-orange: #f59e0b;

  /* 文字层级 */
  --text-main: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* 几何规范 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* 光晕与质感 */
  --glow-cyan: 0 0 35px rgba(0, 242, 254, 0.25);
  --glow-aurora: 0 0 45px rgba(0, 242, 254, 0.25), 0 0 80px rgba(139, 92, 246, 0.18);
  --glow-card-top: inset 0 1px 0 0 rgba(255, 255, 255, 0.13);
  --glow-btn: inset 0 1px 0 rgba(255, 255, 255, 0.45), 0 4px 22px rgba(0, 242, 254, 0.4), 0 0 35px rgba(139, 92, 246, 0.25);

  --transition: all 0.26s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 基础重置 */
*, *::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", sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Linear-style 微米高精科技网格 (点阵 + 线条 + 径向遮罩) */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 10%, #000 40%, transparent 95%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 10%, #000 40%, transparent 95%);
  pointer-events: none;
  z-index: -2;
}

/* 极光深空气氛流体漫反射球 (纯CSS高性能流动微动效) */
body::after {
  content: '';
  position: fixed;
  top: -20%;
  left: 10%;
  width: 80%;
  height: 70%;
  background: 
    radial-gradient(circle at 20% 30%, rgba(0, 242, 254, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 80% 40%, rgba(139, 92, 246, 0.14) 0%, transparent 55%),
    radial-gradient(circle at 50% 80%, rgba(236, 72, 153, 0.08) 0%, transparent 50%);
  filter: blur(80px);
  pointer-events: none;
  z-index: -1;
  animation: aurora-drift 22s ease-in-out infinite alternate;
}

@keyframes aurora-drift {
  0% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
  100% { transform: translateY(20px) scale(0.98); }
}

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

ul {
  list-style: none;
}

img, svg {
  vertical-align: middle;
}

/* 统一布局容器 */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 极光流光渐变文字 */
.text-gradient {
  background: linear-gradient(135deg, #00f2fe 0%, #38bdf8 30%, #a855f7 70%, #ec4899 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% auto;
  animation: text-shimmer 7s linear infinite;
}

@keyframes text-shimmer {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.text-gradient-purple {
  background: linear-gradient(135deg, #a78bfa 0%, #ec4899 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 按钮规范 - Linear / Raycast 顶级光影交互质感 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  border: 1px solid transparent;
  user-select: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #00f2fe 0%, #38bdf8 35%, #8b5cf6 80%, #a855f7 100%);
  color: #040814;
  font-weight: 800;
  border: 1px solid rgba(255, 255, 255, 0.35);
  box-shadow: var(--glow-btn);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 50%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.25) 0%, transparent 100%);
  pointer-events: none;
  border-radius: var(--radius-full) var(--radius-full) 0 0;
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 
    inset 0 1px 0 rgba(255, 255, 255, 0.65),
    0 8px 30px rgba(0, 242, 254, 0.55),
    0 0 50px rgba(139, 92, 246, 0.4);
  filter: brightness(1.08);
}

.btn-primary:active {
  transform: translateY(0) scale(0.99);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-light);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(0, 242, 254, 0.4);
  transform: translateY(-2px);
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15), 0 4px 20px rgba(0, 242, 254, 0.2);
}

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

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
}

/* 顶部导航栏 (Navbar) - 磨砂毛玻璃 & 极细底边框 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(6, 8, 15, 0.72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary-cyan) 0%, var(--primary-purple) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 
    inset 0 1px 0 rgba(255, 255, 255, 0.4),
    0 0 18px rgba(0, 242, 254, 0.45);
}

.logo-icon svg {
  width: 20px;
  height: 20px;
  fill: #fff;
}

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

.nav-link {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text-secondary);
  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: linear-gradient(90deg, var(--primary-cyan), var(--primary-purple));
  transition: var(--transition);
  border-radius: 2px;
}

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

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

/* 移动端汉堡菜单控制 */
#nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  cursor: pointer;
  z-index: 1001;
}

.nav-toggle-label span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--text-main);
  border-radius: 2px;
  transition: var(--transition);
}

/* 首屏横幅区 (Hero Section) - Linear 标志性顶部聚焦光斑 (Spotlight Ray) */
.hero-section {
  padding-top: 155px;
  padding-bottom: 95px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* Linear 顶级光柱投影 (Top Spotlight Cone) */
.hero-section::before {
  content: '';
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  max-width: 100vw;
  height: 480px;
  background: radial-gradient(ellipse 70% 50% at 50% 30%, rgba(0, 242, 254, 0.22) 0%, rgba(139, 92, 246, 0.16) 40%, rgba(236, 72, 153, 0.06) 65%, transparent 80%);
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
}

/* 顶部流光光束微细线 (Keylight Line) */
.hero-section::after {
  content: '';
  position: absolute;
  top: 72px;
  left: 50%;
  transform: translateX(-50%);
  width: 520px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 242, 254, 0.8), rgba(139, 92, 246, 0.8), transparent);
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.6);
  pointer-events: none;
  z-index: 1;
}

.hero-content {
  max-width: 860px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

/* 促销高亮标签 (Raycast Changelog Tag 风格) */
.promo-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(0, 242, 254, 0.3);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1), 0 0 20px rgba(0, 242, 254, 0.15);
  border-radius: var(--radius-full);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--primary-cyan);
  margin-bottom: 26px;
  animation: pulse-glow 3.5s infinite ease-in-out;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-green);
}

@keyframes pulse-glow {
  0%, 100% { border-color: rgba(0, 242, 254, 0.3); }
  50% { border-color: rgba(0, 242, 254, 0.7); box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 0 25px rgba(0, 242, 254, 0.35); }
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 22px;
  color: #fff;
  background: linear-gradient(180deg, #ffffff 30%, #cbd5e1 75%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.18rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 40px;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border-subtle);
  flex-wrap: wrap;
}

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

.stat-num {
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-main);
}

.stat-desc {
  font-size: 0.84rem;
  color: var(--text-muted);
}

/* 核心优势图卡区 (Bento Grid Section) */
.section {
  padding: 90px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 55px auto;
}

.section-tag {
  display: inline-block;
  font-size: 0.84rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.8px;
  color: var(--primary-cyan);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 16px;
  background: linear-gradient(180deg, #ffffff 40%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.cards-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 35px;
}

/* Linear 风格质感卡片：深色微透 + 顶部高光倒角 + 悬浮追光 */
.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: 
    var(--glow-card-top),
    0 12px 32px -8px rgba(0, 0, 0, 0.6);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, #00f2fe, #8b5cf6, #ec4899, transparent);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-5px);
  background: var(--bg-card-hover);
  border-color: rgba(0, 242, 254, 0.35);
  box-shadow: 
    inset 0 1px 0 0 rgba(0, 242, 254, 0.3),
    0 20px 40px -12px rgba(0, 242, 254, 0.2),
    0 0 30px rgba(139, 92, 246, 0.15);
}

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

.feature-icon-wrapper {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15), 0 0 20px rgba(0, 242, 254, 0.1);
  transition: var(--transition);
}

.feature-card:hover .feature-icon-wrapper {
  background: rgba(0, 242, 254, 0.15);
  border-color: rgba(0, 242, 254, 0.4);
  box-shadow: 0 0 25px rgba(0, 242, 254, 0.35);
  transform: scale(1.05);
}

.feature-icon-wrapper svg {
  width: 26px;
  height: 26px;
  stroke: var(--primary-cyan);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
}

.feature-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.68;
}

/* 流媒体与 AI 支持全幅图卡 */
.media-ai-card {
  background: linear-gradient(135deg, rgba(16, 23, 44, 0.8) 0%, rgba(10, 15, 30, 0.92) 100%);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: var(--radius-lg);
  padding: 42px;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 36px;
  align-items: center;
  box-shadow: 
    var(--glow-card-top),
    0 16px 40px -10px rgba(0, 0, 0, 0.6),
    0 0 40px rgba(139, 92, 246, 0.12);
}

.media-ai-content h3 {
  font-size: 1.65rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: #fff;
}

.media-ai-content p {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.72;
  margin-bottom: 22px;
}

.tags-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-light);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  color: #e2e8f0;
  transition: var(--transition);
}

.pill-tag:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(0, 242, 254, 0.3);
}

.pill-tag svg {
  width: 15px;
  height: 15px;
  fill: var(--primary-cyan);
}

.media-badges-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.media-badge-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 10px;
  text-align: center;
  transition: var(--transition);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.media-badge-item:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(0, 242, 254, 0.35);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 242, 254, 0.15);
}

.media-badge-item .badge-title {
  font-size: 0.92rem;
  font-weight: 700;
  display: block;
  color: #fff;
}

.media-badge-item .badge-sub {
  font-size: 0.74rem;
  color: var(--text-muted);
}

/* 定价卡片区 (Pricing Section) - Raycast Pro Tier 质感 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px 30px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
  box-shadow: var(--glow-card-top), 0 12px 30px -8px rgba(0, 0, 0, 0.5);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 20px 40px -10px rgba(0, 0, 0, 0.6);
}

/* VIP2 重点推荐款 (Raycast Pro 风格流光呼吸边框) */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(18, 26, 48, 0.88) 0%, rgba(10, 14, 28, 0.96) 100%);
  border: 1px solid rgba(0, 242, 254, 0.4);
  box-shadow: 
    inset 0 1px 0 rgba(0, 242, 254, 0.45),
    0 0 35px -5px rgba(0, 242, 254, 0.3),
    0 0 65px -10px rgba(139, 92, 246, 0.25);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
  box-shadow: 
    inset 0 1px 0 rgba(0, 242, 254, 0.65),
    0 0 50px -5px rgba(0, 242, 254, 0.45),
    0 0 85px -10px rgba(139, 92, 246, 0.38);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #00f2fe 0%, #38bdf8 30%, #8b5cf6 100%);
  color: #030712;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 5px 18px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  box-shadow: 0 4px 16px rgba(0, 242, 254, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

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

.plan-name {
  font-size: 1.45rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: #fff;
}

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

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 18px;
}

.plan-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary-cyan);
}

.plan-price {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  color: #fff;
}

.plan-unit {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.traffic-pill {
  display: inline-block;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.25);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
  color: var(--primary-cyan);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 22px;
}

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

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

.plan-feature-item svg {
  width: 18px;
  height: 18px;
  fill: var(--accent-green);
  flex-shrink: 0;
  margin-top: 2px;
}

.pricing-card .btn {
  width: 100%;
}

/* 深度特性解析区 (Why Choose Section) */
.why-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
  margin-bottom: 80px;
}

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

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

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

.why-content h3 {
  font-size: 1.9rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 18px;
  color: #fff;
}

.why-content p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.72;
  margin-bottom: 24px;
}

.check-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.check-list-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text-main);
}

.check-list-item svg {
  width: 18px;
  height: 18px;
  fill: var(--primary-cyan);
  flex-shrink: 0;
}

/* 视觉化动态数据面板 (Linear Console Telemetry Panel) */
.telemetry-panel {
  background: rgba(11, 17, 34, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(0, 242, 254, 0.22);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: 
    var(--glow-card-top),
    0 16px 36px rgba(0, 0, 0, 0.55),
    0 0 30px rgba(0, 242, 254, 0.08);
}

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

.live-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-green);
  text-transform: uppercase;
}

.live-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-green);
  animation: blink 1.6s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.85); }
}

.telemetry-metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.metric-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  padding: 15px;
}

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

.metric-val {
  font-size: 1.48rem;
  font-weight: 800;
  color: var(--primary-cyan);
}

.telemetry-progress-wrap {
  margin-top: 14px;
}

.telemetry-progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.progress-bar-bg {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-cyan), var(--primary-blue), var(--primary-purple));
  border-radius: 4px;
  animation: progress-load 3s ease-in-out infinite alternate;
}

@keyframes progress-load {
  0% { width: 85%; }
  100% { width: 98%; }
}

/* 极客终端代码块 (Strict_No_Logs_Policy.sh) */
.terminal-window {
  background: rgba(10, 14, 24, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: 
    var(--glow-card-top),
    0 18px 40px rgba(0, 0, 0, 0.65);
  overflow: hidden;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

.terminal-header {
  background: rgba(22, 27, 40, 0.85);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border-subtle);
}

.terminal-dots {
  display: flex;
  gap: 7px;
}

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

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

.terminal-title {
  margin-left: auto;
  margin-right: auto;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.terminal-body {
  padding: 22px;
  font-size: 0.86rem;
  line-height: 1.65;
  color: #e6edf3;
  overflow-x: auto;
}

.code-comment { color: #8b949e; }
.code-keyword { color: #ff7b72; font-weight: bold; }
.code-cmd { color: #79c0ff; }
.code-str { color: #a5d6ff; }
.code-success { color: #7ee787; font-weight: bold; }

/* 用户评价跑马灯区 (Testimonials Marquee Section) */
.marquee-section {
  padding: 85px 0;
  overflow: hidden;
  position: relative;
}

.marquee-container {
  width: 100%;
  overflow: hidden;
  position: relative;
  mask-image: linear-gradient(to right, transparent, black 12%, black 88%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 12%, black 88%, transparent);
}

.marquee-track {
  display: flex;
  gap: 24px;
  width: max-content;
  animation: marquee-scroll 40s linear infinite;
}

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

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

.testimonial-card {
  width: 360px;
  flex-shrink: 0;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 26px;
  transition: var(--transition);
  box-shadow: var(--glow-card-top);
}

.testimonial-card:hover {
  border-color: rgba(0, 242, 254, 0.4);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 
    inset 0 1px 0 rgba(0, 242, 254, 0.25),
    0 12px 30px rgba(0, 0, 0, 0.45);
}

.rating-stars {
  display: flex;
  gap: 3px;
  margin-bottom: 12px;
}

.star-icon {
  width: 16px;
  height: 16px;
  fill: #fbbf24;
}

.testimonial-text {
  font-size: 0.93rem;
  color: var(--text-secondary);
  line-height: 1.68;
  margin-bottom: 18px;
}

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

.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-cyan), var(--primary-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 0.95rem;
  box-shadow: 0 0 12px rgba(0, 242, 254, 0.35);
}

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

.author-role {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* 常见问题解答区 (FAQ Section) */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: var(--transition);
  overflow: hidden;
  box-shadow: var(--glow-card-top);
}

.faq-item[open] {
  border-color: rgba(0, 242, 254, 0.4);
  background: rgba(18, 25, 46, 0.88);
  box-shadow: 
    inset 0 1px 0 rgba(0, 242, 254, 0.3),
    0 10px 25px rgba(0, 0, 0, 0.4);
}

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

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

.faq-chevron {
  width: 20px;
  height: 20px;
  stroke: var(--primary-cyan);
  transition: transform 0.28s ease;
  flex-shrink: 0;
}

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

.faq-answer {
  padding: 0 24px 22px 24px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.72;
  border-top: 1px solid var(--border-subtle);
  padding-top: 14px;
}

/* 底部转化区 (CTA Section) - Linear 极光流光横幅 */
.cta-banner-section {
  padding: 80px 0 100px 0;
}

.cta-box {
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.12) 0%, rgba(139, 92, 246, 0.16) 50%, rgba(236, 72, 153, 0.1) 100%);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(0, 242, 254, 0.35);
  border-radius: var(--radius-xl);
  padding: 65px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 
    var(--glow-card-top),
    0 24px 50px rgba(0, 0, 0, 0.6),
    var(--glow-aurora);
}

.cta-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 20%;
  right: 20%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary-cyan), var(--primary-purple), transparent);
  box-shadow: 0 0 15px var(--primary-cyan);
}

.cta-box h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: #fff;
  background: linear-gradient(180deg, #ffffff 40%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.cta-box p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 36px auto;
  line-height: 1.75;
}

/* 页脚 (Footer) */
.footer {
  border-top: 1px solid var(--border-subtle);
  background: #04060b;
  padding: 50px 0 38px 0;
  text-align: center;
}

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

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

.footer-link:hover {
  color: var(--primary-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
}

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

/* 独立二级页面专用样式 (About, Terms, Privacy, Sitemap) */
.subpage-hero {
  padding-top: 140px;
  padding-bottom: 40px;
  text-align: center;
}

.subpage-container {
  max-width: 860px;
  margin: 0 auto 80px auto;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--glow-card-top), 0 16px 40px rgba(0, 0, 0, 0.5);
}

.subpage-content h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary-cyan);
  margin-top: 32px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 8px;
}

.subpage-content h2:first-of-type {
  margin-top: 0;
}

.subpage-content p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 18px;
}

.subpage-content ul {
  list-style: disc;
  padding-left: 24px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.75;
}

.subpage-content li {
  margin-bottom: 8px;
}

/* ==========================================================================
   响应式媒体查询 (@media) - 确保手机端全响应式与流畅度
   ========================================================================== */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.8rem;
  }
  
  .cards-grid-3,
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
  
  .media-ai-card {
    grid-template-columns: 1fr;
  }
  
  .why-row, .why-row.reverse {
    grid-template-columns: 1fr;
    gap: 36px;
    direction: ltr;
  }
}

@media (max-width: 768px) {
  .nav-toggle-label {
    display: flex;
  }
  
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(6, 8, 15, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 30px 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border-subtle);
    transform: translateY(-150%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
  }
  
  #nav-toggle:checked ~ .nav-container .nav-links {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  
  #nav-toggle:checked ~ .nav-container .nav-toggle-label span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
  }
  
  #nav-toggle:checked ~ .nav-container .nav-toggle-label span:nth-child(2) {
    opacity: 0;
  }
  
  #nav-toggle:checked ~ .nav-container .nav-toggle-label span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -7px);
  }
  
  .nav-actions .btn-secondary {
    display: none;
  }
  
  .hero-section {
    padding-top: 120px;
    padding-bottom: 60px;
  }
  
  .hero-title {
    font-size: 2.25rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .hero-cta {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-cta .btn {
    width: 100%;
  }
  
  .hero-stats {
    gap: 20px;
  }
  
  .cards-grid-3,
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .section-title {
    font-size: 1.85rem;
  }
  
  .media-ai-card {
    padding: 24px;
  }
  
  .media-badges-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .cta-box {
    padding: 40px 20px;
  }
  
  .cta-box h2 {
    font-size: 1.85rem;
  }
  
  .footer-nav {
    gap: 20px;
  }
  
  .subpage-container {
    padding: 26px 20px;
  }
}

/* ==========================================================================
   深度 SEO 文章专栏与资讯专区专用样式
   ========================================================================== */
.articles-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 36px;
  align-items: flex-start;
  margin-bottom: 80px;
}

.article-sidebar {
  position: sticky;
  top: 96px;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  box-shadow: var(--glow-card-top);
}

.sidebar-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--primary-cyan);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.toc-link {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.45;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  display: block;
}

.toc-link:hover {
  background: rgba(0, 242, 254, 0.1);
  color: var(--primary-cyan);
  transform: translateX(4px);
}

.article-item {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 42px;
  margin-bottom: 48px;
  transition: var(--transition);
  box-shadow: var(--glow-card-top);
}

.article-item:hover {
  border-color: rgba(0, 242, 254, 0.25);
  box-shadow: 
    inset 0 1px 0 rgba(0, 242, 254, 0.2),
    0 12px 30px rgba(0, 0, 0, 0.4);
}

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

.article-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary-cyan);
  background: rgba(0, 242, 254, 0.1);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.article-title {
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1.35;
  color: var(--text-main);
  margin-bottom: 14px;
}

.article-meta {
  display: flex;
  gap: 20px;
  font-size: 0.84rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-content {
  color: var(--text-secondary);
  font-size: 1.02rem;
  line-height: 1.85;
}

.article-content h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  margin-top: 30px;
  margin-bottom: 12px;
  position: relative;
  padding-left: 14px;
}

.article-content h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  background: var(--primary-cyan);
  border-radius: 2px;
}

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

.article-content ul, .article-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

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

.article-content strong {
  color: #fff;
}

.article-content a {
  color: var(--primary-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
  font-weight: 600;
  transition: var(--transition);
}

.article-content a:hover {
  color: #fff;
  text-decoration-color: var(--primary-blue);
}

.article-table-wrap {
  overflow-x: auto;
  margin: 24px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.article-table th {
  background: rgba(255, 255, 255, 0.05);
  padding: 12px 16px;
  font-weight: 700;
  color: var(--text-main);
  border-bottom: 1px solid var(--border-subtle);
}

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

.article-table tr:hover td {
  background: rgba(0, 242, 254, 0.04);
}

.article-callout {
  background: rgba(0, 242, 254, 0.06);
  border-left: 4px solid var(--primary-cyan);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 22px 0;
  font-size: 0.95rem;
  color: #e2e8f0;
}

@media (max-width: 992px) {
  .articles-layout {
    grid-template-columns: 1fr;
  }
  
  .article-sidebar {
    position: relative;
    top: 0;
    max-height: none;
    margin-bottom: 30px;
  }
  
  .article-item {
    padding: 28px 20px;
  }
  
  .article-title {
    font-size: 1.5rem;
  }
}