/* ==========================================================================
   FlyingBird (飞鸟官网) - Design System & Stylesheet
   Domain: flyingbird1.xyz
   ========================================================================== */

:root {
  --bg-dark: #070a12;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.9);
  --border-glow: rgba(56, 189, 248, 0.3);
  --border-accent: rgba(129, 140, 248, 0.45);
  
  --primary: #38bdf8;
  --primary-gradient: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
  --secondary-gradient: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
  --accent-gold: #fbbf24;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-sub: #cbd5e1;
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --shadow-glow: 0 0 35px rgba(56, 189, 248, 0.25);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Canvas Particle Trail for Mouse */
#trail-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 9999;
}

/* ==========================================================================
   BACKGROUND FLYING BIRD ELEMENTS & FLOCK ANIMATION (底层背景飞鸟系统)
   ========================================================================== */
.bg-bird-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

/* Floating Bird Silhouettes in Background */
.bg-bird {
  position: absolute;
  fill: none;
  stroke: url(#bgBirdGrad);
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.25;
  filter: drop-shadow(0 0 12px rgba(56, 189, 248, 0.6));
  animation: birdFloat 14s ease-in-out infinite alternate;
}

.bg-bird.bird-1 {
  top: 12%;
  right: 5%;
  width: 220px;
  height: 220px;
  animation-duration: 16s;
  opacity: 0.35;
}

.bg-bird.bird-2 {
  top: 38%;
  left: 3%;
  width: 180px;
  height: 180px;
  animation-duration: 12s;
  animation-delay: -3s;
  opacity: 0.28;
}

.bg-bird.bird-3 {
  top: 65%;
  right: 8%;
  width: 260px;
  height: 260px;
  animation-duration: 18s;
  animation-delay: -6s;
  opacity: 0.3;
}

.bg-bird.bird-4 {
  top: 85%;
  left: 10%;
  width: 190px;
  height: 190px;
  animation-duration: 15s;
  animation-delay: -9s;
  opacity: 0.22;
}

/* Animated Flying Bird Flock crossing the background */
.flying-flock-item {
  position: absolute;
  opacity: 0.4;
  filter: drop-shadow(0 0 8px rgba(129, 140, 248, 0.8));
  animation: flyAcross 22s linear infinite;
}

.flock-1 {
  top: 15%;
  width: 70px;
  animation-duration: 24s;
  animation-delay: 0s;
}

.flock-2 {
  top: 22%;
  width: 45px;
  animation-duration: 28s;
  animation-delay: -8s;
}

.flock-3 {
  top: 48%;
  width: 90px;
  animation-duration: 20s;
  animation-delay: -14s;
}

.flock-4 {
  top: 72%;
  width: 60px;
  animation-duration: 26s;
  animation-delay: -5s;
}

@keyframes birdFloat {
  0% {
    transform: translateY(0px) rotate(0deg) scale(1);
  }
  50% {
    transform: translateY(-25px) rotate(3deg) scale(1.04);
  }
  100% {
    transform: translateY(15px) rotate(-2deg) scale(0.98);
  }
}

@keyframes flyAcross {
  0% {
    left: -120px;
    transform: translateY(0) scale(0.8) rotate(-5deg);
  }
  50% {
    transform: translateY(-40px) scale(1) rotate(2deg);
  }
  100% {
    left: 105vw;
    transform: translateY(-80px) scale(0.9) rotate(-3deg);
  }
}

/* Background Watermark Big Bird Graphic */
.bg-watermark-bird {
  position: absolute;
  pointer-events: none;
  z-index: 0;
  opacity: 0.08;
  filter: drop-shadow(0 0 40px #38bdf8);
}

.hero-watermark {
  top: 50px;
  right: -50px;
  width: 650px;
  height: 650px;
}

.pricing-watermark {
  bottom: 20px;
  left: -80px;
  width: 700px;
  height: 700px;
  transform: rotate(-15deg);
}

/* Layout Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

/* Utility Classes */
.text-gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  border-radius: var(--radius-full);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.8rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(56, 189, 248, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(129, 140, 248, 0.6);
  opacity: 0.95;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--primary);
}

.btn-block {
  width: 100%;
}

/* Header & Nav */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(7, 10, 18, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: var(--transition);
}

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

.logo-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-main);
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.logo-brand img {
  width: 42px;
  height: 42px;
  filter: drop-shadow(0 0 10px rgba(56, 189, 248, 0.8));
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

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

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

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  padding: 160px 0 100px;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 50% 20%, rgba(56, 189, 248, 0.15) 0%, transparent 65%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}

.hero-content h1 {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 1.2rem;
  letter-spacing: -0.03em;
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--text-sub);
  margin-bottom: 2rem;
  max-width: 600px;
}

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

.hero-stats {
  display: flex;
  gap: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item h3 {
  font-size: 1.8rem;
  color: var(--primary);
  font-weight: 800;
}

.stat-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

.hero-card-preview {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 2rem;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-glow);
  position: relative;
}

.speed-meter {
  text-align: center;
  padding: 1.5rem 0;
}

.speed-value {
  font-size: 3.5rem;
  font-weight: 900;
  color: #38bdf8;
  text-shadow: 0 0 20px rgba(56, 189, 248, 0.6);
}

.speed-label {
  color: var(--text-muted);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.feature-pills {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.pill-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 10px #10b981;
}

/* Features Section */
.section {
  padding: 90px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 4rem;
  position: relative;
  z-index: 1;
}

.section-header h2 {
  font-size: 2.3rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

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

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.8rem;
  position: relative;
  z-index: 1;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: var(--transition);
}

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

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(56, 189, 248, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.5rem;
  margin-bottom: 1.2rem;
}

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

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

/* PRICING SECTION - HORIZONTAL ROW LAYOUT */
.pricing-section {
  background: radial-gradient(ellipse at 50% 50%, rgba(129, 140, 248, 0.1) 0%, transparent 75%);
  position: relative;
}

.pricing-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr); /* Exactly 1 row on desktop */
  gap: 1.5rem;
  align-items: stretch;
  position: relative;
  z-index: 1;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
  backdrop-filter: blur(15px);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary);
  box-shadow: 0 10px 30px rgba(56, 189, 248, 0.3);
}

.pricing-card.popular {
  border-color: var(--primary);
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.95) 0%, rgba(15, 23, 42, 0.95) 100%);
  box-shadow: 0 0 35px rgba(56, 189, 248, 0.35);
}

.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: 0.25rem 1rem;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.pricing-header {
  text-align: center;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.pricing-header h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}

.pricing-price {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-main);
}

.pricing-price span {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 400;
}

.pricing-features {
  list-style: none;
  margin: 1.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  flex-grow: 1;
}

.pricing-features li {
  font-size: 0.9rem;
  color: var(--text-sub);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.pricing-features li svg {
  width: 18px;
  height: 18px;
  color: var(--primary);
  flex-shrink: 0;
}

/* SEO Articles Section */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2rem;
  position: relative;
  z-index: 1;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.article-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
}

.article-tag {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--primary);
  background: rgba(56, 189, 248, 0.12);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.8rem;
  font-weight: 600;
}

.article-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.8rem;
  line-height: 1.4;
}

.article-card h3 a {
  color: var(--text-main);
  text-decoration: none;
  transition: var(--transition);
}

.article-card h3 a:hover {
  color: var(--primary);
}

.article-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.2rem;
  line-height: 1.5;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.read-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.read-link:hover {
  text-decoration: underline;
}

/* Reviews / Testimonials */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.8rem;
  position: relative;
  z-index: 1;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  position: relative;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
}

.user-info h4 {
  font-size: 1rem;
}

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

.stars {
  color: var(--accent-gold);
  font-size: 0.9rem;
  margin-bottom: 0.8rem;
}

.review-card p {
  color: var(--text-sub);
  font-size: 0.92rem;
}

/* FAQ Accordion */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  z-index: 1;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-question {
  padding: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  user-select: none;
}

.faq-question svg {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
  color: var(--primary);
}

.faq-item.active .faq-question svg {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 1.4rem;
  color: var(--text-sub);
  font-size: 0.95rem;
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 1.4rem 1.4rem;
}

/* Banner CTA */
.cta-box {
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.18) 0%, rgba(129, 140, 248, 0.18) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2rem;
  text-align: center;
  backdrop-filter: blur(20px);
  position: relative;
  z-index: 1;
}

.cta-box h2 {
  font-size: 2.2rem;
  margin-bottom: 1rem;
}

.cta-box p {
  color: var(--text-sub);
  max-width: 650px;
  margin: 0 auto 2rem;
  font-size: 1.1rem;
}

/* ==========================================================================
   FOOTER & PBN LINKS INJECTION ZONE (CORE TASK 2)
   ========================================================================== */
footer {
  background: #05070e;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 3.5rem 0 1.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  position: relative;
  overflow: hidden;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  position: relative;
  z-index: 1;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-main);
  font-weight: 700;
}

.footer-brand img {
  width: 32px;
  height: 32px;
}

.footer-nav {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-nav a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

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

/* PBN Friendly Links Injection Block */
.pbn-friendly-links {
  background: rgba(255, 255, 255, 0.02);
  border: 1px dashed rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 1.2rem;
  margin-bottom: 2rem;
  text-align: center;
  position: relative;
  z-index: 1;
}

.pbn-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: 0.8rem;
}

.pbn-links-wrapper {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.8rem 1.2rem;
}

.pbn-links-wrapper a {
  font-size: 0.78rem;
  color: var(--text-muted);
  opacity: 0.8;
  text-decoration: none;
  transition: var(--transition);
}

.pbn-links-wrapper a:hover {
  color: var(--primary);
  opacity: 1;
  text-decoration: underline;
}

.footer-bottom {
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.4);
  position: relative;
  z-index: 1;
}

/* Article Reader Base Styling (For article-*.html) */
.article-container {
  max-width: 860px;
  margin: 140px auto 80px;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

.article-header {
  margin-bottom: 2.5rem;
}

.article-header h1 {
  font-size: 2.4rem;
  line-height: 1.3;
  margin-bottom: 1rem;
}

.article-meta {
  display: flex;
  gap: 1.2rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.article-content {
  color: #e2e8f0;
  font-size: 1.05rem;
  line-height: 1.8;
}

.article-content h2 {
  font-size: 1.6rem;
  color: var(--primary);
  margin: 2.2rem 0 1rem;
}

.article-content h3 {
  font-size: 1.3rem;
  color: var(--text-main);
  margin: 1.8rem 0 0.8rem;
}

.article-content p {
  margin-bottom: 1.4rem;
}

.article-content ul, .article-content ol {
  margin: 1rem 0 1.5rem 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content blockquote {
  border-left: 4px solid var(--primary);
  padding: 1rem 1.5rem;
  background: rgba(56, 189, 248, 0.05);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--text-sub);
}

.article-cta-box {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  padding: 2rem;
  border-radius: var(--radius-md);
  text-align: center;
  margin: 3rem 0;
}

.article-interlinks {
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-top: 3rem;
}

.article-interlinks h4 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  color: var(--primary);
}

.article-interlinks ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.article-interlinks li {
  margin-bottom: 0.6rem;
}

.article-interlinks a {
  color: var(--text-sub);
  text-decoration: none;
  transition: var(--transition);
}

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

/* RESPONSIVE DESIGN (MOBILE & TABLET) */
@media (max-width: 1024px) {
  .pricing-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content h1 {
    font-size: 2.2rem;
  }

  .hero-content p {
    margin: 0 auto 1.8rem;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 80px;
    left: 0;
    width: 100%;
    background: #070a12;
    flex-direction: column;
    padding: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-menu-btn {
    display: block;
  }

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

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

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