/* ==========================================================================
   狗狗加速 (GouGou Accelerator) - 极简高能浅色主题样式表
   ========================================================================== */

/* 全局变量定义 - 浅色清新配色方案 */
:root {
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-header: rgba(255, 255, 255, 0.9);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-gradient: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%);
  --accent-light: #eff6ff;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 25px -5px rgba(37, 99, 235, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* 布局容器 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 通用按钮组件 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 1rem;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  transition: all 0.25s ease;
  cursor: pointer;
  border: none;
  text-align: center;
  line-height: 1;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
  opacity: 0.95;
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--primary-color);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--accent-light);
  border-color: var(--primary-color);
  transform: translateY(-2px);
}

.btn-lg {
  font-size: 1.125rem;
  padding: 16px 40px;
}

/* 导航头 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-header);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.logo-badge {
  background: var(--primary-gradient);
  color: white;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
}

.logo-img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid #ffffff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
  vertical-align: middle;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s;
}

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

/* Hero 主视觉区 */
.hero {
  padding: 90px 0 70px;
  text-align: center;
  background: radial-gradient(circle at 50% 20%, rgba(37, 99, 235, 0.08) 0%, rgba(248, 250, 252, 0) 70%);
}

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

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -1px;
  color: var(--text-primary);
}

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

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 36px;
  font-weight: 400;
}

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

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--bg-card);
  padding: 24px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
}

.hero-image-wrapper {
  max-width: 960px;
  margin: 40px auto 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 45px -10px rgba(37, 99, 235, 0.18), 0 0 0 1px rgba(226, 232, 240, 0.9);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero-image-wrapper:hover {
  transform: translateY(-4px);
  box-shadow: 0 25px 55px -10px rgba(37, 99, 235, 0.25);
}

.hero-showcase-img {
  width: 100%;
  height: auto;
  display: block;
}

.stat-item {
  text-align: center;
  padding: 0 16px;
  border-right: 1px solid var(--border-color);
}

.stat-item:last-child {
  border-right: none;
}

.stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary-color);
}

.stat-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* 版块通用格式 */
.section {
  padding: 80px 0;
}

.section-alt {
  background-color: #ffffff;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 56px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

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

/* 核心优势网格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  padding: 32px 28px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.3);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: var(--accent-light);
  color: var(--primary-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* 流媒体与 AI 支持 */
.support-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.support-card {
  background-color: var(--bg-main);
  padding: 24px 20px;
  border-radius: var(--radius-md);
  text-align: center;
  border: 1px solid var(--border-color);
  transition: transform 0.2s ease;
}

.support-card:hover {
  transform: scale(1.03);
  background-color: var(--accent-light);
}

.support-badge {
  display: inline-block;
  font-size: 2.2rem;
  margin-bottom: 8px;
}

.support-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.support-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* 价格对比表 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
  align-items: stretch;
}

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

.pricing-card:hover {
  box-shadow: var(--shadow-lg);
}

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

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gradient);
  color: white;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.pricing-header h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.pricing-price {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--primary-color);
  margin-bottom: 6px;
}

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

.pricing-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.pricing-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.pricing-features li::before {
  content: "✓";
  color: var(--primary-color);
  font-weight: 900;
}

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

/* 用户评价 */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.testimonial-card {
  background-color: var(--bg-main);
  padding: 28px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.testimonial-stars {
  color: #f59e0b;
  margin-bottom: 12px;
  font-size: 1.1rem;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 20px;
  line-height: 1.6;
}

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

.avatar-placeholder {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.author-info h5 {
  font-size: 0.95rem;
  font-weight: 700;
}

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

/* FAQ 问答 */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
  gap: 24px;
}

.faq-card {
  background-color: var(--bg-card);
  padding: 28px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.faq-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.faq-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* 底部极简页脚 */
.site-footer {
  background-color: #ffffff;
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: color 0.2s ease;
}

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

.footer-copyright {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* 子页通用模板样式 (关于我们/条款/隐私/地图) */
.page-header {
  background: var(--accent-light);
  padding: 60px 0;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
}

.page-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.page-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.content-section {
  padding: 60px 0 100px;
}

.content-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 40px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.content-block {
  margin-bottom: 36px;
}

.content-block:last-child {
  margin-bottom: 0;
}

.content-block h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.content-block h2::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 20px;
  background: var(--primary-color);
  border-radius: 2px;
}

.content-block p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 12px;
}

.content-block ul {
  padding-left: 20px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

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

/* 响应式适配 (@media) */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.75rem;
  }
  .pricing-card.featured {
    transform: none;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 70px;
  }
  .nav-links {
    display: none; /* 移动端精简导航 */
  }
  .hero {
    padding: 50px 0 40px;
  }
  .hero-title {
    font-size: 2rem;
  }
  .hero-subtitle {
    font-size: 1rem;
  }
  .hero-cta {
    flex-direction: column;
    width: 100%;
  }
  .hero-cta .btn {
    width: 100%;
  }
  .hero-stats {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .stat-item {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
  }
  .stat-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }
  .section {
    padding: 50px 0;
  }
  .section-title {
    font-size: 1.75rem;
  }
  .faq-grid {
    grid-template-columns: 1fr;
  }
  .footer-links {
    flex-direction: column;
    gap: 16px;
  }
  .content-card {
    padding: 24px;
  }
}

/* ==========================================================================
   推荐资讯 - 高科技网格卡片 (Grid Cards) 布局样式
   ========================================================================== */

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 32px;
  margin-top: 20px;
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

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

.blog-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.3);
}

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

.blog-card-header {
  margin-bottom: 16px;
}

.blog-card-badge {
  display: inline-block;
  background: var(--accent-light);
  color: var(--primary-color);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 14px;
  border: 1px solid rgba(37, 99, 235, 0.15);
}

.blog-card-title {
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.blog-card-title a {
  transition: color 0.2s;
}

.blog-card-title a:hover {
  color: var(--primary-color);
}

.blog-card-excerpt {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
}

.blog-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.blog-card-btn {
  color: var(--primary-color);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s ease;
}

.blog-card-btn:hover {
  gap: 10px;
}

/* SEO 文章排版优化 */
.article-meta-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 12px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-primary);
}

.article-content h2 {
  font-size: 1.65rem;
  font-weight: 800;
  margin: 36px 0 16px;
  color: var(--text-primary);
  border-bottom: 2px solid var(--accent-light);
  padding-bottom: 8px;
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin: 28px 0 14px;
  color: var(--primary-color);
}

.article-content p {
  margin-bottom: 20px;
  color: #334155;
}

.article-content ul, .article-content ol {
  margin-bottom: 24px;
  padding-left: 24px;
  color: #334155;
}

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

.article-content blockquote {
  background: var(--accent-light);
  border-left: 4px solid var(--primary-color);
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  margin: 24px 0;
  font-style: italic;
  color: var(--text-secondary);
}

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

.article-content a:hover {
  color: var(--primary-hover);
}

.btn-back {
  margin-bottom: 30px;
  display: inline-flex;
}