/* 闪跃 FlashLeap / shanyue - 极简高质感浅色主题样式 */
:root {
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --accent-cyan: #0284c7;
  --accent-purple: #7c3aed;
  --text-main: #0f172a;
  --text-muted: #475569;
  --border-color: #e2e8f0;
  --border-glow: rgba(37, 99, 235, 0.3);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius-lg: 16px;
  --radius-md: 10px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05), 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 12px -2px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 28px -6px rgba(37, 99, 235, 0.18);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
}

body {
  overflow-x: hidden;
}

/* 布局与容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 头部导航 */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
  text-decoration: none;
}

.logo-icon {
  background: linear-gradient(135deg, var(--accent-cyan), var(--primary));
  color: #ffffff;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: bold;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

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

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

/* 按钮基础类 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all 0.25s ease;
  cursor: pointer;
  min-height: 48px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.28);
  border: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
  filter: brightness(1.05);
}

.btn-secondary {
  background: #ffffff;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
}

.btn-large {
  padding: 16px 36px;
  font-size: 1.1rem;
  border-radius: 12px;
}

/* Hero 主视觉区 */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.2);
  color: var(--primary);
  padding: 6px 18px;
  border-radius: 30px;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 20px;
  color: var(--text-main);
}

.hero-title span {
  background: linear-gradient(135deg, var(--accent-cyan), var(--primary), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 36px;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}

/* 统计参数列表 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
  padding: 30px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.stat-item h3 {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
}

.stat-item p {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* 通用 Section 标题 */
.section {
  padding: 80px 0;
}

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

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-main);
}

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

/* 核心优势卡片 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 50px;
  height: 50px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
  color: var(--text-main);
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* 流媒体与 AI 支持 */
.media-ai-box {
  background: linear-gradient(135deg, #ffffff, #f1f5f9);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.media-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 24px;
}

.media-tag {
  background: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 10px 20px;
  border-radius: 30px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--shadow-sm);
}

/* 价格套餐表 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, box-shadow 0.3s;
}

.pricing-card.popular {
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-lg);
  transform: scale(1.03);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  color: #ffffff;
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
}

.pricing-header h3 {
  font-size: 1.4rem;
  margin-bottom: 8px;
  color: var(--text-main);
}

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

.pricing-price {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--text-main);
  margin: 16px 0;
}

.pricing-price span {
  font-size: 1rem;
  color: var(--text-muted);
  font-weight: 400;
}

.pricing-features {
  list-style: none;
  margin: 24px 0;
  flex-grow: 1;
}

.pricing-features li {
  padding: 10px 0;
  color: var(--text-muted);
  border-bottom: 1px solid #f1f5f9;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
}

.pricing-features li::before {
  content: "✓";
  color: var(--primary);
  font-weight: bold;
}

/* 高科技网格卡片 (Grid Cards) 布局 */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 30px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
  position: relative;
  overflow: hidden;
}

.article-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent-cyan));
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.card-tag {
  display: inline-block;
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 14px;
  align-self: flex-start;
}

.article-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
  color: var(--text-main);
}

.article-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid #f1f5f9;
  padding-top: 14px;
  font-size: 0.82rem;
  color: #94a3b8;
}

.card-meta a {
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
}

.card-meta a:hover {
  text-decoration: underline;
}

/* 用户评价 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--primary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  color: #ffffff;
}

.review-author h4 {
  font-size: 1rem;
  color: var(--text-main);
}

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

.rating {
  color: #f59e0b;
  margin-bottom: 12px;
}

.review-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* FAQ 问答 */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.faq-item h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  color: var(--text-main);
}

.faq-item p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* 底部 CTA */
.bottom-cta {
  text-align: center;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.06), rgba(2, 132, 199, 0.08));
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: 24px;
  padding: 60px 20px;
  margin: 60px 0;
}

.bottom-cta h2 {
  font-size: 2.2rem;
  margin-bottom: 16px;
  color: var(--text-main);
}

.bottom-cta p {
  color: var(--text-muted);
  margin-bottom: 30px;
  font-size: 1.1rem;
}

/* 页脚：严格符合“只保留这四个标题，内容打开新的页面展示” */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  background: #ffffff;
  text-align: center;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  list-style: none;
  margin-bottom: 20px;
}

.footer-nav a {
  color: var(--text-muted);
  font-size: 1.05rem;
  font-weight: 600;
  text-decoration: none;
  transition: color 0.2s;
}

.footer-nav a:hover {
  color: var(--primary);
}

.footer-copy {
  color: #94a3b8;
  font-size: 0.85rem;
}

/* 独立子页面通用样式 */
.page-header {
  padding: 60px 0 30px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 40px;
}

.page-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--text-main);
}

.page-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-bottom: 60px;
  line-height: 1.8;
  box-shadow: var(--shadow-sm);
}

.page-content h2 {
  font-size: 1.5rem;
  color: var(--primary);
  margin: 30px 0 15px;
}

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

.page-content p {
  color: var(--text-muted);
  margin-bottom: 16px;
}

.page-content ul {
  margin-left: 20px;
  margin-bottom: 20px;
  color: var(--text-muted);
}

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

/* 响应式媒体查询（@media 完美适配移动端） */
@media (max-width: 992px) {
  .hero-title { font-size: 2.5rem; }
  .features-grid, .pricing-grid, .reviews-grid, .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card.popular {
    transform: none;
  }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero-title { font-size: 2rem; }
  .hero-subtitle { font-size: 1rem; }
  .hero-cta { flex-direction: column; }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 20px;
  }
  
  .features-grid, .pricing-grid, .reviews-grid, .faq-grid, .articles-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-nav {
    flex-direction: column;
    gap: 16px;
  }
  
  .btn-large {
    width: 100%;
  }

  .page-content {
    padding: 24px;
  }
}