/* ==========================================================================
   可乐云 (Cola Cloud) - 官方风格样式表
   Design: Glassmorphism UI (毛玻璃拟物风格 + 柔和糖果粉蓝渐变)
   Typography: Poppins + 原生中文字体优化
   ========================================================================== */

:root {
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-gradient: linear-gradient(135deg, #4f8cf6 0%, #ec4899 100%);
  --primary-gradient-hover: linear-gradient(135deg, #3b76e8 0%, #db2777 100%);
  --secondary-gradient: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --accent-pink: #f472b6;
  --accent-blue: #60a5fa;
  
  /* 毛玻璃卡片系统参数 */
  --glass-bg: rgba(255, 255, 255, 0.68);
  --glass-bg-hover: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.85);
  --glass-border-focus: rgba(79, 140, 246, 0.5);
  --glass-shadow: 0 12px 32px 0 rgba(148, 163, 184, 0.16);
  --glass-shadow-hover: 0 18px 40px 0 rgba(148, 163, 184, 0.26);
  --glass-blur: blur(16px);
  
  /* 基础文字与配色 */
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --bg-gradient: linear-gradient(135deg, #e0f2fe 0%, #fdf2f8 50%, #eff6ff 100%);
  
  /* 布局与圆角 */
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  --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 {
  font-family: 'Poppins', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text-main);
  background: var(--bg-gradient);
  min-height: 100vh;
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 背景浮动光斑装饰球 (Floating Pastel Blobs) */
.bg-blob {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  z-index: -1;
  pointer-events: none;
  opacity: 0.6;
  animation: floatBlobs 18s ease-in-out infinite alternate;
}

.blob-1 {
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(147, 197, 253, 0.8) 0%, rgba(191, 219, 254, 0.3) 70%);
  top: -100px;
  left: -100px;
}

.blob-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(251, 207, 232, 0.8) 0%, rgba(253, 242, 248, 0.3) 70%);
  bottom: 10%;
  right: -120px;
  animation-duration: 22s;
  animation-delay: -5s;
}

.blob-3 {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(186, 230, 253, 0.7) 0%, rgba(240, 249, 255, 0.2) 70%);
  top: 45%;
  left: 20%;
  animation-duration: 26s;
  animation-delay: -9s;
}

@keyframes floatBlobs {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, 40px) scale(1.08); }
  100% { transform: translate(-25px, -20px) scale(0.95); }
}

/* 通用容器与排版 */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-full);
  margin-bottom: 14px;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.08);
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #0f172a;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto;
}

/* 毛玻璃卡片通用样式 */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.glass-card:hover {
  background: var(--glass-bg-hover);
  box-shadow: var(--glass-shadow-hover);
  border-color: rgba(255, 255, 255, 1);
  transform: translateY(-5px);
}

/* 导航栏 Header */
.navbar {
  position: sticky;
  top: 16px;
  z-index: 1000;
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 0 24px;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 10px 30px rgba(148, 163, 184, 0.15);
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-size: 1.35rem;
  font-weight: 800;
  color: #0f172a;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.15rem;
  box-shadow: 0 4px 12px rgba(236, 72, 153, 0.28);
}

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

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s ease;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
}

.nav-links a.nav-special {
  color: #d946ef;
  font-weight: 600;
  padding: 4px 12px;
  background: rgba(240, 171, 252, 0.2);
  border-radius: var(--radius-full);
  border: 1px solid rgba(217, 70, 239, 0.25);
  transition: all 0.2s ease;
}

.nav-links a.nav-special:hover {
  background: rgba(240, 171, 252, 0.35);
  transform: translateY(-1px);
}

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

/* 按钮通用组件 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  text-decoration: none;
  padding: 12px 26px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  border: none;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: 0 8px 20px rgba(236, 72, 153, 0.25);
}

.btn-primary:hover {
  background: var(--primary-gradient-hover);
  box-shadow: 0 12px 28px rgba(236, 72, 153, 0.38);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.8);
  color: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 6px 18px rgba(148, 163, 184, 0.12);
}

.btn-secondary:hover {
  background: #ffffff;
  color: var(--primary);
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: 0 10px 24px rgba(59, 130, 246, 0.16);
  transform: translateY(-2px);
}

.btn-dofollow {
  background: rgba(255, 255, 255, 0.85);
  color: #0284c7;
  border: 1px solid rgba(56, 189, 248, 0.4);
  box-shadow: 0 6px 18px rgba(56, 189, 248, 0.12);
}

.btn-dofollow:hover {
  background: #f0f9ff;
  color: #0369a1;
  border-color: #0284c7;
  box-shadow: 0 10px 24px rgba(2, 132, 199, 0.2);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 34px;
  font-size: 1.05rem;
  border-radius: var(--radius-full);
}

.btn-block {
  width: 100%;
}

/* 主视觉区 Hero Section */
.hero-section {
  padding: 80px 0 90px;
  text-align: center;
  position: relative;
}

.hero-content {
  max-width: 880px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.7);
  padding: 8px 20px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 4px 16px rgba(148, 163, 184, 0.12);
  font-size: 0.9rem;
  font-weight: 500;
  color: #475569;
  margin-bottom: 24px;
}

.hero-badge-tag {
  background: var(--primary-gradient);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 20px;
  text-transform: uppercase;
}

.hero-title {
  font-size: 3.5rem;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #0f172a;
  margin-bottom: 22px;
}

.hero-title-gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.25rem;
  font-weight: 600;
  color: #334155;
  margin-bottom: 16px;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-highlights {
  display: flex;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
  color: #475569;
  font-size: 0.92rem;
  font-weight: 500;
}

.highlight-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.highlight-item svg {
  color: #10b981;
}

/* 核心优势卡片 Core Features (3个图文卡片) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

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

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

.feature-icon-wrapper {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  box-shadow: 0 8px 20px rgba(148, 163, 184, 0.15);
  font-size: 1.8rem;
  color: var(--primary);
}

.feature-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.7;
  flex-grow: 1;
}

.feature-meta {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(226, 232, 240, 0.6);
  font-size: 0.85rem;
  font-weight: 600;
  color: #0284c7;
}

/* 流媒体与AI支持卡片 */
.streaming-ai-section {
  padding: 60px 0;
}

.grid-platforms {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.platform-card {
  padding: 24px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.platform-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: #ffffff;
  box-shadow: 0 4px 12px rgba(148, 163, 184, 0.12);
  flex-shrink: 0;
}

.platform-info h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 2px;
}

.platform-info p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* 套餐价格对比表 Pricing Table */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  padding: 36px 26px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card.popular {
  border: 2px solid rgba(236, 72, 153, 0.5);
  background: rgba(255, 255, 255, 0.82);
  transform: translateY(-8px);
  box-shadow: 0 20px 45px rgba(236, 72, 153, 0.15);
}

.pricing-card.popular:hover {
  transform: translateY(-12px);
  box-shadow: 0 24px 50px rgba(236, 72, 153, 0.22);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gradient);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 12px rgba(236, 72, 153, 0.35);
  letter-spacing: 0.05em;
}

.pricing-header {
  margin-bottom: 20px;
  text-align: center;
}

.pricing-name {
  font-size: 1.3rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 8px;
}

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

.pricing-price {
  text-align: center;
  margin: 16px 0 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
}

.currency {
  font-size: 1.3rem;
  font-weight: 600;
  color: #0f172a;
  vertical-align: top;
}

.amount {
  font-size: 2.8rem;
  font-weight: 800;
  color: #0f172a;
  line-height: 1;
}

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

.pricing-features {
  list-style: none;
  margin-bottom: 28px;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: #334155;
  margin-bottom: 12px;
}

.pricing-features li svg {
  color: #10b981;
  flex-shrink: 0;
}

/* 常见问题解答 FAQ */
.faq-grid {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  padding: 24px 28px;
  border-radius: var(--radius-md);
}

.faq-item h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.faq-item h3::before {
  content: 'Q';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  background: var(--primary-gradient);
  color: #fff;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 800;
  flex-shrink: 0;
}

.faq-item p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  padding-left: 36px;
}

/* 用户评价 Reviews */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.review-card {
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-stars {
  color: #f59e0b;
  font-size: 1.1rem;
  margin-bottom: 14px;
}

.review-content {
  font-size: 0.95rem;
  color: #334155;
  line-height: 1.7;
  margin-bottom: 20px;
  flex-grow: 1;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid rgba(226, 232, 240, 0.6);
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #cbd5e1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
}

.author-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #0f172a;
}

.author-info span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 页脚 Footer (严格只保留四个标题，点击打开新页面展示) */
.footer {
  margin-top: 80px;
  padding: 50px 0 40px;
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid rgba(255, 255, 255, 0.8);
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 48px;
  margin-bottom: 30px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-nav a {
  font-size: 1.05rem;
  font-weight: 600;
  color: #334155;
  text-decoration: none;
  transition: all 0.2s ease;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.footer-nav a:hover {
  color: var(--primary);
  background: rgba(255, 255, 255, 0.8);
  transform: translateY(-2px);
}

.footer-copyright {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(226, 232, 240, 0.6);
  padding-top: 24px;
  max-width: 600px;
  margin: 0 auto;
}

/* 资讯与详情页专用样式 */
.article-header {
  padding: 60px 0 30px;
  text-align: center;
}

.article-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.news-card {
  padding: 30px;
  display: flex;
  flex-direction: column;
}

.news-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: #0284c7;
  background: #e0f2fe;
  padding: 4px 10px;
  border-radius: 6px;
  align-self: flex-start;
  margin-bottom: 12px;
}

.news-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 12px;
  line-height: 1.4;
}

.news-card p {
  color: var(--text-muted);
  font-size: 0.93rem;
  line-height: 1.7;
  margin-bottom: 18px;
  flex-grow: 1;
}

.news-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-light);
  border-top: 1px solid rgba(226, 232, 240, 0.6);
  padding-top: 14px;
}

.article-content {
  padding: 44px;
  line-height: 1.85;
  font-size: 1.02rem;
  color: #334155;
}

.article-content h1 {
  font-size: 2.2rem;
  font-weight: 800;
  color: #0f172a;
  margin-bottom: 20px;
  line-height: 1.3;
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #0f172a;
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid rgba(59, 130, 246, 0.15);
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #1e293b;
  margin: 24px 0 12px;
}

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

.article-content ul, .article-content ol {
  margin: 16px 0 20px 24px;
}

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

.article-content a {
  color: #0284c7;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color 0.2s ease;
}

.article-content a:hover {
  color: #0369a1;
}

/* 响应式适配媒体查询 Responsive Styles */
@media (max-width: 1024px) {
  .features-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .grid-platforms {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .section {
    padding: 50px 0;
  }
  
  .hero-section {
    padding: 50px 0 60px;
  }
  
  .hero-title {
    font-size: 2.35rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .hero-desc {
    font-size: 0.95rem;
  }
  
  .hero-actions {
    flex-direction: column;
    gap: 14px;
    width: 100%;
  }
  
  .hero-actions .btn {
    width: 100%;
    min-height: 48px;
  }
  
  .nav-container {
    padding: 12px 18px;
  }
  
  .nav-links {
    display: none; /* 移动端精简模式 */
  }
  
  .features-grid,
  .pricing-grid,
  .reviews-grid,
  .news-grid,
  .grid-platforms {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .pricing-card.popular {
    transform: none;
  }
  
  .pricing-card.popular:hover {
    transform: translateY(-4px);
  }
  
  .footer-nav {
    flex-direction: column;
    gap: 16px;
  }
  
  .article-content {
    padding: 24px 18px;
  }
  
  .article-content h1 {
    font-size: 1.7rem;
  }
}