@charset "utf-8";
:root {
  --primary-color: #0369a1;
  --primary-dark: #0c4a6e;
  --primary-light: #38bdf8;
  --secondary-color: #0891b2;
  --secondary-light: #7dd3fc;
  --accent-color: #059669;
  --accent-light: #10b981;
  --accent-dark: #047857;
  --success-color: #059669;
  --warning-color: #d97706;
  --info-color: #0284c7;
  --text-dark: #0c4a6e;
  --text-light: #075985;
  --text-muted: #64748b;
  --bg-light: #f0f9ff;
  --bg-white: #ffffff;
  --bg-gradient-start: #e0f2fe;
  --bg-gradient-end: #bae6fd;
  --border-color: #bae6fd;
  --shadow: 0 2px 10px rgba(3,105,161,0.1);
  --shadow-hover: 0 8px 25px rgba(3,105,161,0.15);
  --radius: 12px;
  --transition: all 0.3s ease;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.02); }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes slideInRight {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes rotateGradient {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
@keyframes glow {
  0%, 100% { box-shadow: 0 0 20px rgba(3,105,161,0.3); }
  50% { box-shadow: 0 0 40px rgba(3,105,161,0.6); }
}
@keyframes bounce {
  0%, 100%, 20%, 50%, 80% { transform: translateY(0); }
  40% { transform: translateY(-10px); }
  60% { transform: translateY(-5px); }
}
@keyframes ripple {
  0% { transform: scale(0.8); opacity: 1; }
  100% { transform: scale(2.4); opacity: 0; }
}
@keyframes shine {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  color: var(--text-dark);
  background: var(--bg-white);
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; height: auto; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}
.header {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
  max-width: 1200px;
  margin: 0 auto;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}
.logo svg { width: 36px; height: 36px; }
.nav { display: flex; gap: 30px; }
.nav a {
  font-weight: 500;
  color: var(--text-dark);
  position: relative;
}
.nav a:hover, .nav a.active { color: var(--primary-color); }
.nav a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: var(--transition);
}
.nav a:hover::after, .nav a.active::after { width: 100%; }
.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 5px; }
.menu-toggle svg { width: 28px; height: 28px; color: var(--text-dark); }
.nav-download-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(3,105,161,0.4);
}
.nav-download-btn::after {
  display: none;
}
.hero {
  background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 50%, #7dd3fc 100%);
  color: #0c4a6e;
  padding: 100px 0;
  text-align: center;
  overflow: hidden;
  position: relative;
}
.hero-visual {
  max-width: 600px;
  margin: 0 auto 30px;
}
.hero-bg {
  width: 100%;
  height: auto;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid rgba(3,105,161,0.15);
}
.stat-item { text-align: center; }
.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  display: block;
}
.stat-label {
  font-size: 0.95rem;
  color: var(--text-light);
  margin-top: 5px;
}
.step-icon {
  position: relative;
}
.step-number {
  position: absolute;
  top: -8px;
  right: -8px;
  width: 28px;
  height: 28px;
  background: var(--accent-color);
  border-radius: 50%;
  color: white;
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.3rem;
  font-weight: 700;
  color: white;
}
.footer-logo svg { width: 28px; height: 28px; }
.hero h1 { font-size: 3rem; margin-bottom: 20px; font-weight: 800; }
.hero p { font-size: 1.25rem; color: var(--text-light); margin-bottom: 30px; max-width: 700px; margin-left: auto; margin-right: auto; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}
.btn-primary { background: linear-gradient(135deg, #0369a1 0%, #0284c7 100%); color: white; }
.btn-primary:hover { background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%); transform: translateY(-2px); box-shadow: 0 5px 20px rgba(3,105,161,0.4); }
.btn-secondary { background: var(--bg-white); color: var(--primary-color); border: 2px solid var(--primary-color); }
.btn-secondary:hover { background: var(--primary-color); color: white; transform: translateY(-2px); }
.btn svg { width: 20px; height: 20px; }
.section { padding: 80px 0; }
.section-title {
  text-align: center;
  margin-bottom: 50px;
}
.section-title h2 {
  font-size: 2.5rem;
  color: var(--text-dark);
  margin-bottom: 15px;
}
.section-title p { color: var(--text-light); font-size: 1.1rem; }
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}
.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 35px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(3,105,161,0.05), transparent);
  transition: left 0.5s ease;
}
.feature-card:hover::before { left: 100%; }
.feature-card:hover .card-shine { left: 100%; }
.feature-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-hover);
}
.feature-icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  transition: var(--transition);
}
.feature-card:hover .feature-icon {
  transform: scale(1.1);
  animation: pulse 1.5s ease-in-out infinite;
}
.feature-icon svg { width: 35px; height: 35px; color: white; }
.feature-card h3 { font-size: 1.3rem; margin-bottom: 12px; color: var(--text-dark); }
.feature-card p { color: var(--text-light); font-size: 0.95rem; }
.download-section { background: var(--bg-light); }
.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}
.download-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  align-items: center;
}
.download-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
}
.download-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.download-card:hover .os-icon {
  transform: scale(1.05);
}
.download-card:hover .card-glow {
  opacity: 1;
}
.card-glow {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 0%, rgba(3,105,161,0.08) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}
.btn-ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  transform: scale(0);
  animation: ripple 0.6s linear;
  pointer-events: none;
}
.download-btn {
  overflow: hidden;
}
.download-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(3,105,161,0.3);
}
.os-icon {
  width: 90px;
  height: 90px;
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
}
.os-icon svg { 
  width: 75px; 
  height: 75px; 
  flex-shrink: 0;
}
.download-card h3 { 
  font-size: 1.4rem; 
  margin-bottom: 8px; 
  color: var(--text-dark); 
  flex-shrink: 0;
}
.download-card .version { 
  color: var(--text-light); 
  margin-bottom: 12px; 
  font-size: 0.9rem; 
  flex-shrink: 0;
}
.download-card .btn { 
  width: 100%; 
  justify-content: center; 
  flex-shrink: 0;
}
.download-card > div:not(.card-glow):not(.os-icon) {
  flex-shrink: 0;
}
.download-card .btn {
  margin-top: auto;
  padding: 12px 24px;
}
.mobile-download {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
}
.mobile-download h3 { font-size: 1.5rem; margin-bottom: 15px; color: var(--text-dark); }
.mobile-download p { color: var(--text-light); margin-bottom: 25px; }
.mobile-icons { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }
.mobile-icon {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 25px;
  background: var(--bg-light);
  border-radius: 50px;
  font-weight: 500;
  color: var(--text-dark);
  transition: var(--transition);
  border: 1px solid var(--border-color);
}
.mobile-icon:hover { background: var(--primary-color); color: white; border-color: var(--primary-color); }
.mobile-icon svg { width: 24px; height: 24px; }
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
}
.blog-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border-color);
}
.blog-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.blog-card .blog-image {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  display: flex;
  align-items: center;
  justify-content: center;
}
.blog-card .blog-image svg { width: 60px; height: 60px; color: white; opacity: 0.8; }
.blog-badge {
  position: absolute;
  top: 15px;
  right: 15px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
}
.blog-badge svg { width: 18px; height: 18px; color: white; }
.blog-card:hover .blog-badge {
  transform: scale(1.1) rotate(10deg);
}
.blog-tags { margin-bottom: 10px; }
.tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}
.tag-tip {
  background: linear-gradient(135deg, rgba(3,105,161,0.1) 0%, rgba(3,105,161,0.05) 100%);
  color: #0369a1;
}
.tag-security {
  background: linear-gradient(135deg, rgba(8,145,178,0.1) 0%, rgba(8,145,178,0.05) 100%);
  color: #0891b2;
}
.tag-enterprise {
  background: linear-gradient(135deg, rgba(139,92,246,0.1) 0%, rgba(139,92,246,0.05) 100%);
  color: #7c3aed;
}
.blog-content { padding: 25px; }
.blog-meta { font-size: 0.85rem; color: var(--text-light); margin-bottom: 10px; }
.blog-card h3 { font-size: 1.25rem; margin-bottom: 12px; color: var(--text-dark); line-height: 1.4; }
.blog-card h3 a:hover { color: var(--primary-color); }
.blog-card p { color: var(--text-light); font-size: 0.95rem; margin-bottom: 15px; }
.read-more {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--primary-color);
  font-weight: 500;
}
.read-more:hover { gap: 10px; }
.read-more svg { width: 16px; height: 16px; }
.footer {
  background: linear-gradient(135deg, #0c4a6e 0%, #075985 100%);
  color: white;
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}
.footer-col h4 { font-size: 1.1rem; margin-bottom: 20px; color: white; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col a { color: rgba(255,255,255,0.7); font-size: 0.95rem; }
.footer-col a:hover { color: white; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 30px;
  text-align: center;
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
}
.social-links { display: flex; gap: 15px; }
.social-links a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.social-links a:hover { background: var(--primary-light); }
.social-links svg { width: 20px; height: 20px; color: white; }
.page-header {
  background: linear-gradient(135deg, #0369a1 0%, #0284c7 100%);
  color: white;
  padding: 10px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-header h1 {
  font-size: 1.5rem;
  margin-bottom: 5px;
}
.page-header p {
  font-size: 0.9rem;
  margin: 0;
  opacity: 0.9;
}
.header-decoration {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
}
.header-bg {
  width: 100%;
  height: 100%;
}
.page-header h1 { font-size: 2.5rem; margin-bottom: 10px; }
.page-header p { font-size: 1.1rem; opacity: 0.9; }
.breadcrumb {
  padding: 15px 0;
  background: var(--bg-light);
}
.breadcrumb .container { display: flex; align-items: center; gap: 10px; font-size: 0.9rem; color: var(--text-light); }
.breadcrumb a:hover { color: var(--primary-color); }
.breadcrumb svg { width: 16px; height: 16px; }
.about-content { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.about-text h2 { font-size: 2rem; margin-bottom: 20px; color: var(--text-dark); }
.about-text p { color: var(--text-light); margin-bottom: 15px; }
.about-image {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: var(--radius);
  height: 350px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.about-image svg { width: 150px; height: 150px; color: white; opacity: 0.8; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; margin-top: 50px; }
.stat-item { text-align: center; padding: 30px; background: var(--bg-white); border-radius: var(--radius); box-shadow: var(--shadow); transition: var(--transition); border: 1px solid var(--border-color); }
.stat-item:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.stat-icon { width: 48px; height: 48px; margin: 0 auto 15px; display: flex; align-items: center; justify-content: center; background: rgba(3,105,161,0.1); border-radius: 12px; transition: var(--transition); color: var(--primary-color); }
.stat-item:hover .stat-icon { transform: scale(1.1); }
.stat-icon svg { width: 24px; height: 24px; }
.stat-number { font-size: 3rem; font-weight: 700; color: var(--primary-color); }
.stat-label { color: var(--text-light); margin-top: 5px; }
.blog-detail { max-width: 800px; margin: 0 auto; }
.blog-detail-header { text-align: center; margin-bottom: 40px; }
.blog-detail-header h1 { font-size: 2.2rem; margin-bottom: 15px; color: var(--text-dark); }
.blog-detail .meta { color: var(--text-light); font-size: 0.95rem; display: flex; justify-content: center; gap: 20px; }
.blog-detail-content { line-height: 1.9; color: var(--text-dark); }
.blog-detail-content h2 { font-size: 1.6rem; margin: 30px 0 15px; color: var(--text-dark); }
.blog-detail-content h3 { font-size: 1.3rem; margin: 25px 0 12px; color: var(--text-dark); }
.blog-detail-content p { margin-bottom: 18px; }
.blog-detail-content ul, .blog-detail-content ol { margin: 18px 0; padding-left: 25px; }
.blog-detail-content li { margin-bottom: 8px; }
.back-link { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 30px; color: var(--primary-color); font-weight: 500; }
.back-link:hover { gap: 12px; }
.back-link svg { width: 20px; height: 20px; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.animate { animation: fadeIn 0.6s ease forwards; }
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.testimonial-card { background: var(--bg-white); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow); transition: var(--transition); border: 1px solid var(--border-color); }
.testimonial-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.testimonial-header { display: flex; align-items: center; gap: 15px; margin-bottom: 20px; }
.user-avatar { width: 50px; height: 50px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); }
.user-avatar svg { width: 24px; height: 24px; color: white; }
.user-info h4 { margin: 0; font-size: 1.1rem; }
.user-info p { margin: 5px 0 0; font-size: 0.9rem; color: var(--text-light); }
.rating { display: flex; gap: 3px; margin-left: auto; color: #fbbf24; }
.rating svg { width: 16px; height: 16px; }
.testimonial-card p { font-size: 0.95rem; line-height: 1.7; color: var(--text-light); font-style: italic; }
.faq-section { max-width: 800px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border-color); transition: var(--transition); }
.faq-item:first-child { border-top: 1px solid var(--border-color); }
.faq-question { width: 100%; display: flex; align-items: center; justify-content: space-between; padding: 20px 0; background: none; border: none; cursor: pointer; text-align: left; font-size: 1rem; font-weight: 500; color: var(--text-dark); transition: var(--transition); }
.faq-question:hover { color: var(--primary-color); }
.faq-question[aria-expanded="true"] { color: var(--primary-color); }
.faq-icon { width: 20px; height: 20px; flex-shrink: 0; transition: transform 0.3s ease; color: var(--primary-color); }
.faq-question[aria-expanded="true"] .faq-icon { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-answer p { margin: 0 0 20px; padding-right: 30px; line-height: 1.7; color: var(--text-light); }
.faq-question[aria-expanded="true"] + .faq-answer { max-height: 200px; }
.btn-white { background: white; color: var(--primary-color); border: 2px solid white; }
.btn-white:hover { background: rgba(255,255,255,0.9); color: var(--primary-dark); }
.btn-outline-white { background: transparent; color: white; border: 2px solid white; }
.btn-outline-white:hover { background: white; color: var(--primary-color); }
.install-steps { max-width: 800px; margin: 0 auto; }
.install-step {
  display: flex;
  gap: 20px;
  padding: 25px 0;
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}
.install-step:last-child { border-bottom: none; }
.install-step:hover { transform: translateX(5px); }
.step-number {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  flex-shrink: 0;
  box-shadow: 0 4px 15px rgba(3,105,161,0.3);
}
.step-content h3 { margin: 0 0 8px; font-size: 1.1rem; color: var(--text-dark); }
.step-content p { margin: 0; color: var(--text-light); font-size: 0.95rem; line-height: 1.6; }
.faq-mini { max-width: 800px; margin: 0 auto; }
.faq-mini-item {
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}
.faq-mini-item:first-child { border-top: 1px solid var(--border-color); }
.faq-mini-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-dark);
  transition: var(--transition);
}
.faq-mini-question:hover { color: var(--primary-color); }
.faq-mini-question[aria-expanded="true"] { color: var(--primary-color); }
.faq-mini-question svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
  color: var(--primary-color);
}
.faq-mini-question[aria-expanded="true"] svg { transform: rotate(45deg); }
.faq-mini-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-mini-answer p {
  margin: 0 0 18px;
  padding-right: 30px;
  line-height: 1.7;
  color: var(--text-light);
  font-size: 0.95rem;
}
.faq-mini-answer code {
  background: var(--bg-light);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.85rem;
  color: var(--primary-color);
}
.faq-mini-question[aria-expanded="true"] + .faq-mini-answer { max-height: 150px; }
.certificates-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.cert-item {
  background: white;
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border-color);
}
.cert-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}
.cert-item svg {
  width: 64px;
  height: 64px;
  margin-bottom: 12px;
}
.cert-item span {
  display: block;
  font-size: 0.85rem;
  color: var(--text-light);
  font-weight: 500;
}
@media (max-width: 768px) {
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--bg-white); flex-direction: column; padding: 20px; gap: 15px; box-shadow: var(--shadow); }
  .nav.active { display: flex; }
  .nav-download-btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: fit-content;
    margin: 0 auto;
  }
  .menu-toggle { display: block; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }
  .section { padding: 50px 0; }
  .section-title h2 { font-size: 1.8rem; }
  .about-content { grid-template-columns: 1fr; }
  .about-image { height: 250px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; text-align: center; }
  .social-links { justify-content: center; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 1.6rem; }
  .btn { padding: 12px 24px; font-size: 0.95rem; }
  .download-grid { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .testimonial-header { flex-wrap: wrap; }
  .rating { margin-left: 0; margin-top: 10px; width: 100%; }
  .certificates-grid { grid-template-columns: repeat(2, 1fr); }
}