/* ==========================================================================
   飞鸟网络加速器 - 商务简洁版 CSS 样式表 (Pure CSS / Business Sleek Theme)
   设计风格：现代商务简洁 / 侧重极速秒开 / 动态 CSS 视觉组件 / 响应式 / SEO文章卡片 / PBN友情链接
   ========================================================================== */

/* 1. CSS 自定义变量 (商务深暗色调) */
:root {
  --bg-dark: #0b0f19;
  --bg-darker: #060911;
  --bg-card: rgba(18, 26, 43, 0.75);
  --bg-card-hover: rgba(26, 38, 64, 0.9);
  --bg-card-solid: #121a2b;
  
  --primary: #2563eb;         /* 商务极客蓝 */
  --primary-light: #3b82f6;
  --primary-hover: #1d4ed8;
  --primary-glow: rgba(37, 99, 235, 0.3);
  
  --accent-cyan: #06b6d4;      /* 辅助青蓝 */
  --accent-purple: #7c3aed;    /* 辅助紫 */
  --success: #10b981;          /* 成功绿 */
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(59, 130, 246, 0.4);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1240px;
}

/* 2. 基础重置与全局样式 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: '';
  position: fixed;
  top: -200px;
  right: -100px;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.12) 0%, rgba(6, 182, 212, 0.05) 45%, transparent 70%);
  z-index: -1;
  pointer-events: none;
}

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

ul {
  list-style: none;
}

img, svg {
  vertical-align: middle;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* 3. 商务页眉与导航目录 */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 15, 25, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-main);
}

.brand-logo svg {
  width: 32px;
  height: 32px;
  color: var(--primary-light);
}

.brand-logo .logo-highlight {
  color: var(--primary-light);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}

.nav-menu a {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  padding: 0.25rem 0;
}

.nav-menu a:hover {
  color: var(--text-main);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--primary-light);
  transition: var(--transition);
  border-radius: 2px;
}

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

.nav-cta {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* 4. 通用按钮组件 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius-full);
  transition: var(--transition);
  cursor: pointer;
  border: none;
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #1d4ed8 100%);
  color: #ffffff;
  box-shadow: 0 4px 18px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(37, 99, 235, 0.45);
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 0.85rem 2.25rem;
  font-size: 1.05rem;
}

.btn-block {
  width: 100%;
}

/* 5. 商务主视觉区 (Hero Section) */
.hero-section {
  padding: 4.5rem 0 5rem;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  text-align: left;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  border-radius: var(--radius-full);
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid rgba(37, 99, 235, 0.3);
  color: var(--primary-light);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 10px var(--success);
  animation: pulse-ping 2s infinite ease-in-out;
}

.hero-title {
  font-size: 2.85rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.8px;
  margin-bottom: 1.25rem;
  color: #ffffff;
}

.gradient-text {
  background: linear-gradient(135deg, #60a5fa 0%, #38bdf8 50%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 2.25rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-tags {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
}

.tag-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.tag-item svg {
  color: var(--success);
  width: 16px;
  height: 16px;
}

/* 6. 右侧动态视觉展示卡片 */
.hero-visual {
  position: relative;
}

.visual-card {
  background: var(--bg-card-solid);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
  position: relative;
  overflow: hidden;
}

.visual-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--accent-cyan) 50%, var(--accent-purple) 100%);
}

.visual-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-color);
}

.visual-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.visual-status {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--success);
  background: rgba(16, 185, 129, 0.1);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.node-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  transition: var(--transition);
}

.node-item:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border-glow);
}

.node-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.88rem;
  font-weight: 600;
}

.node-flag {
  font-size: 1.1rem;
}

.node-ping {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--success);
}

.ping-bar {
  width: 40px;
  height: 4px;
  background: rgba(16, 185, 129, 0.2);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
}

.ping-bar-fill {
  height: 100%;
  background: var(--success);
  width: 90%;
  animation: traffic-wave 2.5s infinite alternate ease-in-out;
}

.float-card {
  position: absolute;
  background: rgba(18, 26, 43, 0.95);
  border: 1px solid var(--border-glow);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  padding: 0.75rem 1.1rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  z-index: 10;
}

.float-card-1 {
  top: -20px;
  right: -15px;
  animation: float-slow 4s infinite ease-in-out;
}

.float-card-2 {
  bottom: -25px;
  left: -20px;
  animation: float-reverse 5s infinite ease-in-out;
}

.float-icon {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: rgba(37, 99, 235, 0.15);
  color: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
}

.float-icon svg {
  width: 18px;
  height: 18px;
}

.float-text h5 {
  font-size: 0.82rem;
  font-weight: 700;
}

.float-text p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

@keyframes pulse-ping {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

@keyframes float-slow {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

@keyframes float-reverse {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(10px); }
}

@keyframes traffic-wave {
  0% { width: 65%; }
  100% { width: 95%; }
}

/* 7. 通用区块标题 */
.section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 3.5rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 0.85rem;
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 1.02rem;
  color: var(--text-muted);
}

/* 8. 核心优势图卡 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.25rem 1.85rem;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.feature-card:hover {
  transform: translateY(-5px);
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
}

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid rgba(37, 99, 235, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.35rem;
  color: var(--primary-light);
}

.feature-icon-wrapper svg {
  width: 26px;
  height: 26px;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.65;
}

/* 9. 流媒体与 AI 支持 Section */
.unlock-section {
  background: linear-gradient(180deg, transparent 0%, rgba(18, 26, 43, 0.4) 50%, transparent 100%);
  padding: 5rem 0;
}

.unlock-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.unlock-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.25rem;
  backdrop-filter: blur(10px);
}

.unlock-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.unlock-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
}

.unlock-icon.media {
  background: linear-gradient(135deg, #e50914 0%, #b81d24 100%);
}

.unlock-icon.ai {
  background: linear-gradient(135deg, #10a37f 0%, #0d8a6a 100%);
}

.unlock-icon svg {
  width: 24px;
  height: 24px;
}

.unlock-title {
  font-size: 1.2rem;
  font-weight: 700;
}

.unlock-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.services-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
}

.pill-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--success);
}

/* 10. 价格表 (Pricing Comparison Table) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.35rem 1.85rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
  backdrop-filter: blur(10px);
}

.pricing-card.popular {
  background: var(--bg-card-solid);
  border: 2px solid var(--primary-light);
  box-shadow: 0 10px 35px rgba(37, 99, 235, 0.25);
  transform: scale(1.02);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 1rem;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
}

.pricing-header h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.pricing-header p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.pricing-price {
  margin-bottom: 1.75rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.pricing-price .amount {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--text-main);
}

.pricing-price .currency {
  font-size: 1.35rem;
  vertical-align: super;
}

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

.pricing-features {
  margin-bottom: 2rem;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 0.8rem;
}

.pricing-features li svg {
  color: var(--primary-light);
  width: 17px;
  height: 17px;
  flex-shrink: 0;
}

/* 11. SEO 文章卡片区 */
.articles-section {
  background: linear-gradient(180deg, rgba(18, 26, 43, 0.4) 0%, transparent 100%);
  padding: 5rem 0;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
  backdrop-filter: blur(10px);
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.article-card-header {
  padding: 1.75rem 1.6rem 1rem;
}

.article-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--primary-light);
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid rgba(37, 99, 235, 0.25);
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.85rem;
}

.article-tag.featured {
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.12);
  border-color: rgba(6, 182, 212, 0.3);
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 0.75rem;
  color: var(--text-main);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 1rem;
}

.article-card-footer {
  padding: 1rem 1.6rem 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.article-link {
  color: var(--primary-light);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: var(--transition);
}

.article-link:hover {
  color: #ffffff;
  transform: translateX(3px);
}

/* 12. 用户评价 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.85rem;
}

.stars {
  display: flex;
  gap: 0.2rem;
  color: #f59e0b;
  margin-bottom: 1rem;
}

.stars svg {
  width: 15px;
  height: 15px;
  fill: currentColor;
}

.review-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 1.35rem;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 0.88rem;
}

.author-info h4 {
  font-size: 0.9rem;
  font-weight: 600;
}

.author-info p {
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* 13. 常见问题 (FAQ Accordion) */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

details.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

details.faq-item[open] {
  border-color: var(--border-glow);
  background: var(--bg-card-solid);
}

summary.faq-question {
  padding: 1.15rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

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

summary.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--primary-light);
  transition: transform 0.3s ease;
}

details[open] summary.faq-question::after {
  content: '-';
}

.faq-answer {
  padding: 0 1.5rem 1.15rem;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.7;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  margin-top: 0.5rem;
  padding-top: 0.85rem;
}

/* 14. 页脚 (Footer strictly contains ONLY the 4 requested links + PBN Dofollow Links) */
.footer {
  border-top: 1px solid var(--border-color);
  background: var(--bg-darker);
  padding: 3.5rem 0 2rem;
}

.footer-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: 2.5rem;
}

.footer-logo {
  margin-bottom: 1.5rem;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-nav a {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
  transition: var(--transition);
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
}

.footer-nav a:hover {
  color: var(--text-main);
  border-color: var(--primary-light);
  background: rgba(37, 99, 235, 0.1);
}

.footer-bottom {
  text-align: center;
  padding-top: 1.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* PBN 主博客矩阵 dofollow 友情链接外链声明 */
.footer-pbn-links {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1.75rem;
  flex-wrap: wrap;
  font-size: 0.88rem;
}

.footer-pbn-label {
  color: var(--text-muted);
  font-weight: 600;
}

.footer-pbn-links a {
  color: #38bdf8;
  font-weight: 600;
  transition: var(--transition);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-pbn-links a:hover {
  color: #60a5fa;
  text-shadow: 0 0 12px rgba(96, 165, 250, 0.6);
}

/* 15. 响应式布局 */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .hero-content {
    text-align: center;
  }
  
  .hero-actions, .hero-tags {
    justify-content: center;
  }
  
  .features-grid,
  .pricing-grid,
  .articles-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .hero-title {
    font-size: 2.15rem;
  }
  
  .features-grid,
  .unlock-grid,
  .pricing-grid,
  .articles-grid,
  .reviews-grid,
  .sitemap-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
  
  .footer-nav {
    flex-direction: column;
    gap: 0.85rem;
    width: 100%;
  }
  
  .footer-nav a {
    width: 100%;
    text-align: center;
  }
  
  .footer-pbn-links {
    flex-direction: column;
    gap: 0.65rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.8rem;
  }
  
  .section-title {
    font-size: 1.65rem;
  }
}