/* ==========================================================================
   海獭 HaiTa - 品牌专属【海洋赛博科技 (Aqua Cybertech)】视觉设计系统
   设计理念：以灵动、敏捷的海獭与深海发光生物学为灵感，结合高科技交互体验
   ========================================================================== */

:root {
  /* 品牌调色盘 (Sea Otter Aqua Cyber System) */
  --sea-depths: #050914;
  --sea-dark: #0a1026;
  --sea-surface: #101a38;
  --sea-card: rgba(14, 25, 54, 0.65);
  --sea-card-hover: rgba(22, 38, 78, 0.85);
  
  --border-glow: rgba(0, 245, 212, 0.25);
  --border-glow-active: rgba(0, 245, 212, 0.65);
  
  /* 核心电光色彩 */
  --otter-teal: #00f5d4;        /* 海獭发光青 */
  --otter-cyan: #00bbf9;        /* 电光海洋蓝 */
  --otter-purple: #9b51e0;      /* 深海幻紫 */
  --otter-coral: #ff2a85;       /* 活力珊瑚粉 */
  --otter-gold: #ffb703;        /* 珍珠金 */

  /* 渐变组合 */
  --grad-otter-primary: linear-gradient(135deg, #00f5d4 0%, #00bbf9 50%, #4b6cb7 100%);
  --grad-otter-glow: linear-gradient(135deg, rgba(0, 245, 212, 0.2) 0%, rgba(0, 187, 249, 0.1) 100%);
  --grad-coral-accent: linear-gradient(135deg, #ff2a85 0%, #ff758c 100%);
  --grad-text: linear-gradient(135deg, #ffffff 0%, #00f5d4 50%, #00bbf9 100%);
  --grad-card-border: linear-gradient(135deg, rgba(0, 245, 212, 0.4), rgba(155, 81, 224, 0.2));

  /* 排版与文本 */
  --text-primary: #f8fafc;
  --text-secondary: #a0aec0;
  --text-dim: #64748b;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* 边框与阴影 */
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-pill: 9999px;

  --shadow-otter-glow: 0 0 30px rgba(0, 245, 212, 0.25);
  --shadow-card-hover: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 245, 212, 0.15);

  --transition-smooth: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--sea-depths);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  /* 海洋赛博与极速下载网格粒子动态数据流背景 (Download Speed Stream Cyber Grid) */
  background-image: 
    linear-gradient(rgba(0, 245, 212, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 245, 212, 0.04) 1px, transparent 1px),
    radial-gradient(circle at 20% 15%, rgba(0, 245, 212, 0.14) 0%, transparent 45%),
    radial-gradient(circle at 80% 65%, rgba(155, 81, 224, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 50% 85%, rgba(0, 187, 249, 0.1) 0%, transparent 55%);
  background-size: 48px 48px, 48px 48px, 100% 100%, 100% 100%, 100% 100%;
  background-position: -1px -1px, -1px -1px, 0 0, 0 0, 0 0;
  background-attachment: fixed, fixed, fixed, fixed, fixed;
  animation: downloadGridStream 30s linear infinite;
}

@keyframes downloadGridStream {
  0% {
    background-position: 0 0, 0 0, 0 0, 0 0, 0 0;
  }
  100% {
    background-position: 0 480px, 480px 0, 0 0, 0 0, 0 0;
  }
}

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

/* 无障碍 Skip Link 跳转到主要内容 */
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background: var(--otter-teal);
  color: #030814;
  padding: 12px 24px;
  font-weight: 800;
  border-radius: var(--radius-sm);
  z-index: 9999;
  transition: top 0.2s ease;
  box-shadow: 0 0 20px rgba(0, 245, 212, 0.5);
}

.skip-link:focus {
  top: 20px;
  outline: 3px solid var(--otter-cyan);
}

/* 容器与布局 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section, section, .kb-block-card {
  padding: 100px 0;
  position: relative;
  /* 防止固定页眉遮挡锚点标题 */
  scroll-margin-top: 100px;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 680px;
  margin: 0 auto 60px auto;
  line-height: 1.7;
}

/* 动态渐变字 */
.text-gradient {
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* 动态互动按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 36px;
  font-size: 1.05rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  transition: var(--transition-smooth);
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
  z-index: 1;
  white-space: nowrap;
  min-width: 44px;
  min-height: 44px;
}

.btn-primary {
  background: var(--grad-otter-primary);
  color: #030814;
  box-shadow: 0 8px 30px rgba(0, 245, 212, 0.35);
}

/* 按钮高光流光特效 */
.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: 0.6s ease;
  z-index: 2;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 40px rgba(0, 245, 212, 0.55);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  border: 1px solid rgba(0, 245, 212, 0.25);
  backdrop-filter: blur(12px);
}

.btn-secondary:hover {
  background: rgba(0, 245, 212, 0.1);
  border-color: var(--otter-teal);
  color: var(--otter-teal);
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0, 245, 212, 0.2);
}

.btn-lg {
  padding: 18px 44px;
  font-size: 1.15rem;
}

/* Header 顶部毛玻璃导航栏 */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(5, 9, 20, 0.82);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 245, 212, 0.12);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 84px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: var(--grad-otter-primary);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  box-shadow: 0 0 24px rgba(0, 245, 212, 0.4);
  animation: otterFloat 4s ease-in-out infinite;
}

@keyframes otterFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-4px) rotate(4deg); }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.98rem;
  transition: var(--transition-smooth);
  position: relative;
  padding: 6px 0;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--otter-teal);
  transition: var(--transition-smooth);
  border-radius: 2px;
}

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

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

/* Hero 强烈科技感主视觉区 */
.hero {
  padding-top: 190px;
  padding-bottom: 110px;
  text-align: center;
  position: relative;
  overflow: hidden;
  scroll-margin-top: 100px;
}

.hero-bg-glow {
  position: absolute;
  top: 15%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 750px;
  height: 750px;
  background: radial-gradient(circle, rgba(0, 245, 212, 0.18) 0%, rgba(0, 187, 249, 0.08) 40%, transparent 70%);
  filter: blur(100px);
  pointer-events: none;
  z-index: 0;
  animation: pulseGlow 8s ease-in-out infinite alternate;
}

@keyframes pulseGlow {
  0% { transform: translate(-50%, -50%) scale(0.9); opacity: 0.7; }
  100% { transform: translate(-50%, -50%) scale(1.15); opacity: 1; }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 24px;
  border-radius: var(--radius-pill);
  background: rgba(0, 245, 212, 0.08);
  border: 1px solid rgba(0, 245, 212, 0.3);
  color: var(--otter-teal);
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 32px;
  backdrop-filter: blur(10px);
  box-shadow: 0 0 20px rgba(0, 245, 212, 0.15);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--otter-teal);
  box-shadow: 0 0 10px var(--otter-teal);
  animation: pingDot 1.8s cubic-bezier(0, 0, 0.2, 1) infinite;
}

@keyframes pingDot {
  75%, 100% { transform: scale(2); opacity: 0; }
}

.hero-title {
  font-size: 3.6rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.03em;
  margin-bottom: 28px;
}

.hero-desc {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 780px;
  margin: 0 auto 44px auto;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

/* 极速下载风格客户端支持栏 */
.download-platforms-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 36px;
  padding: 16px 28px;
  background: rgba(0, 245, 212, 0.04);
  border: 1px dashed rgba(0, 245, 212, 0.25);
  border-radius: var(--radius-pill);
}

.download-platform-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-secondary);
  transition: var(--transition-smooth);
  min-height: 44px;
}

.download-platform-item:hover {
  color: var(--otter-teal);
  transform: translateY(-2px);
}

/* 互动数据看板 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 960px;
  margin: 60px auto 0 auto;
  padding: 36px;
  background: var(--sea-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-otter-glow);
  transition: var(--transition-smooth);
}

.hero-stats:hover {
  border-color: var(--border-glow-active);
}

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

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -12px;
  top: 20%;
  height: 60%;
  width: 1px;
  background: rgba(255, 255, 255, 0.08);
}

.stat-num {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--otter-teal);
  text-shadow: 0 0 20px rgba(0, 245, 212, 0.4);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 6px;
  font-weight: 500;
}

/* 核心优势 3大卡片 (互动 Glassmorphism 3D 感) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  background: var(--sea-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 44px 36px;
  transition: var(--transition-smooth);
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--grad-otter-primary);
  opacity: 0;
  transition: var(--transition-smooth);
}

.feature-card:hover {
  background: var(--sea-card-hover);
  border-color: var(--otter-teal);
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
}

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

.feature-icon-wrapper {
  width: 68px;
  height: 68px;
  background: rgba(0, 245, 212, 0.12);
  border: 1px solid rgba(0, 245, 212, 0.3);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--otter-teal);
  margin-bottom: 28px;
  box-shadow: 0 0 20px rgba(0, 245, 212, 0.2);
  transition: var(--transition-smooth);
}

.feature-card:hover .feature-icon-wrapper {
  background: var(--otter-teal);
  color: #030814;
  transform: scale(1.08) rotate(-4deg);
}

.feature-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 14px;
}

.feature-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
}

/* 知识科普 9 大板块样式 */
.kb-blocks-index {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 50px;
}

.kb-index-chip {
  background: var(--sea-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: var(--transition-smooth);
  min-height: 44px;
}

.kb-index-chip:hover {
  border-color: var(--otter-teal);
  background: var(--sea-card-hover);
  transform: translateY(-3px);
  color: var(--otter-teal);
  box-shadow: 0 10px 25px rgba(0, 245, 212, 0.15);
}

.kb-block-card {
  background: var(--sea-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 48px;
  margin-bottom: 40px;
  backdrop-filter: blur(16px);
  position: relative;
  transition: var(--transition-smooth);
  scroll-margin-top: 100px;
}

.kb-block-card:hover {
  border-color: rgba(0, 245, 212, 0.5);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 245, 212, 0.15);
}

.kb-block-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  background: rgba(0, 245, 212, 0.1);
  border: 1px solid rgba(0, 245, 212, 0.3);
  color: var(--otter-teal);
  font-size: 0.85rem;
  font-weight: 800;
  margin-bottom: 16px;
}

/* 流媒体与 AI 支持专区 (双栏极客水波卡片) */
.media-ai-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.media-ai-card {
  background: linear-gradient(150deg, rgba(14, 25, 54, 0.8) 0%, rgba(6, 11, 26, 0.95) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 44px;
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.media-ai-card:hover {
  border-color: var(--otter-cyan);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.media-ai-tag {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--otter-teal);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: inline-block;
}

.media-ai-title {
  font-size: 1.85rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.media-ai-desc {
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-size: 1.05rem;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tag-item {
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(0, 245, 212, 0.15);
  border-radius: var(--radius-pill);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: var(--transition-smooth);
}

.tag-item:hover {
  background: rgba(0, 245, 212, 0.15);
  border-color: var(--otter-teal);
  color: var(--otter-teal);
  transform: translateY(-2px);
}

.tag-item .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--otter-teal);
  box-shadow: 0 0 8px var(--otter-teal);
}

/* 价格套餐对比表 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.pricing-card {
  background: var(--sea-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 40px 28px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
  position: relative;
  backdrop-filter: blur(16px);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--otter-teal);
  box-shadow: var(--shadow-card-hover);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(0, 245, 212, 0.12) 0%, rgba(10, 16, 38, 0.95) 100%);
  border: 2px solid var(--otter-teal);
  transform: translateY(-10px);
  box-shadow: 0 20px 50px rgba(0, 245, 212, 0.25);
}

.badge-featured {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--grad-otter-primary);
  color: #030814;
  font-size: 0.82rem;
  font-weight: 900;
  padding: 5px 20px;
  border-radius: var(--radius-pill);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  box-shadow: 0 6px 20px rgba(0, 245, 212, 0.4);
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  min-height: 42px;
}

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

.plan-currency {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--otter-teal);
}

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

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

.plan-features {
  list-style: none;
  margin-bottom: 36px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.plan-feature-item svg {
  width: 20px;
  height: 20px;
  color: var(--otter-teal);
  flex-shrink: 0;
}

/* 用户评价区 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.review-card {
  background: var(--sea-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 32px;
  backdrop-filter: blur(12px);
  transition: var(--transition-smooth);
}

.review-card:hover {
  transform: translateY(-6px);
  border-color: var(--otter-teal);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
}

.review-stars {
  color: var(--otter-gold);
  margin-bottom: 18px;
  font-size: 1.15rem;
}

.review-text {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.author-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--grad-otter-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #030814;
  font-weight: 900;
  font-size: 1.1rem;
  box-shadow: 0 0 16px rgba(0, 245, 212, 0.3);
}

.author-name {
  font-weight: 800;
  font-size: 1rem;
}

.author-role {
  font-size: 0.82rem;
  color: var(--text-dim);
}

/* 6大常见问题 FAQ (原生 details/summary 兼容无 JS 展示) */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.faq-card {
  background: var(--sea-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: var(--transition-smooth);
}

details.faq-card summary {
  cursor: pointer;
  list-style: none;
}

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

.faq-card:hover {
  border-color: var(--otter-teal);
  background: var(--sea-card-hover);
}

.faq-question {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-primary);
}

.faq-question-icon {
  color: var(--otter-teal);
  font-weight: 900;
}

.faq-answer {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.7;
}

/* 页脚 Footer - 保留4个独立链接 */
.footer {
  background: #03060f;
  border-top: 1px solid rgba(0, 245, 212, 0.12);
  padding: 70px 0 44px 0;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 44px;
}

.footer-nav {
  display: flex;
  align-items: center;
  gap: 40px;
  list-style: none;
}

.footer-nav-link {
  color: var(--text-secondary);
  font-size: 1.05rem;
  font-weight: 600;
  transition: var(--transition-smooth);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.footer-nav-link:hover {
  color: var(--otter-teal);
  text-shadow: 0 0 12px rgba(0, 245, 212, 0.4);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 36px;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* 子页面独立通用规范 */
.page-header {
  padding-top: 160px;
  padding-bottom: 48px;
  text-align: center;
  background: radial-gradient(circle at top center, rgba(0, 245, 212, 0.12) 0%, transparent 65%);
}

.content-body {
  background: var(--sea-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 56px;
  margin-bottom: 90px;
  line-height: 1.85;
  color: var(--text-secondary);
  backdrop-filter: blur(16px);
}

.content-body h2 {
  color: var(--text-primary);
  font-size: 1.6rem;
  margin: 36px 0 18px 0;
}

.content-body h2:first-child {
  margin-top: 0;
}

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

.content-body ul {
  margin-bottom: 28px;
  padding-left: 28px;
}

.content-body li {
  margin-bottom: 10px;
}

/* 减弱动画适配 (prefers-reduced-motion) */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* 响应式媒体查询 @media */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid {
    grid-template-columns: repeat(1, 1fr);
  }
  .kb-blocks-index {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 74px;
  }

  .nav-links {
    display: none;
  }

  .hero {
    padding-top: 140px;
    padding-bottom: 60px;
  }

  .hero-title {
    font-size: 2.35rem;
  }

  .hero-desc {
    font-size: 1.08rem;
  }

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

  .btn {
    width: 100%;
    padding: 17px 24px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    padding: 24px;
  }

  .stat-item:not(:last-child)::after {
    display: none;
  }

  .media-ai-container {
    grid-template-columns: 1fr;
  }

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

  .pricing-card.featured {
    transform: none;
  }

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

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

  .kb-blocks-index {
    grid-template-columns: 1fr;
  }

  .footer-top {
    flex-direction: column;
    gap: 28px;
    text-align: center;
  }

  .footer-nav {
    flex-direction: column;
    gap: 18px;
  }

  .content-body, .kb-block-card {
    padding: 28px;
  }
}