/* === Reset & Base === */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', -apple-system, 'PingFang SC', 'Source Han Sans CN', 'Microsoft YaHei', sans-serif;
  background: linear-gradient(135deg, #0a0e27 0%, #1a1040 50%, #0d1137 100%);
  color: #e8eaf6;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }

/* === Container === */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* === Header === */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(10, 14, 39, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.header-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.logo { display: flex; align-items: center; gap: 10px; font-size: 1.35rem; font-weight: 700; color: #fff; }
.logo-icon {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, #00e5ff, #7c4dff);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; color: #fff; font-weight: 800;
}
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a {
  font-size: 0.95rem; color: rgba(255,255,255,0.75); transition: color 0.3s;
  position: relative; padding: 4px 0;
}
.nav-links a:hover, .nav-links a.active { color: #00e5ff; }
.nav-links a.active::after {
  content: ''; position: absolute; bottom: -2px; left: 0; right: 0;
  height: 2px; background: #00e5ff; border-radius: 1px;
}
.header-actions { display: flex; align-items: center; gap: 16px; }
.lang-switch {
  display: flex; align-items: center; gap: 6px;
  font-size: 0.85rem; color: rgba(255,255,255,0.6);
  padding: 6px 12px; border: 1px solid rgba(255,255,255,0.15);
  border-radius: 8px; transition: all 0.3s;
}
.lang-switch:hover { border-color: #00e5ff; color: #00e5ff; }
.btn-login {
  padding: 8px 22px; border-radius: 8px; font-size: 0.9rem; font-weight: 600;
  background: linear-gradient(135deg, #00e5ff, #7c4dff);
  color: #fff; transition: transform 0.3s, box-shadow 0.3s;
}
.btn-login:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(0,229,255,0.3); }

/* === Mobile Nav === */
.mobile-menu-btn { display: none; flex-direction: column; gap: 5px; padding: 8px; cursor: pointer; }
.mobile-menu-btn span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: 0.3s; }

/* === Buttons === */
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 36px; border-radius: 12px; font-size: 1.05rem; font-weight: 700;
  background: linear-gradient(135deg, #00e5ff, #7c4dff);
  color: #fff; transition: transform 0.3s, box-shadow 0.3s;
  min-height: 48px;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,229,255,0.35); }
.btn-secondary {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 36px; border-radius: 12px; font-size: 1.05rem; font-weight: 600;
  background: transparent; color: #00e5ff;
  border: 2px solid rgba(0,229,255,0.4);
  transition: all 0.3s; min-height: 48px;
}
.btn-secondary:hover { border-color: #00e5ff; background: rgba(0,229,255,0.08); }

/* === Section Common === */
.section { padding: 120px 0; }
.section-tag {
  display: inline-block; padding: 6px 18px; border-radius: 50px;
  background: rgba(0,229,255,0.1); color: #00e5ff;
  font-size: 0.85rem; font-weight: 600; letter-spacing: 1px;
  text-transform: uppercase; margin-bottom: 16px;
}
.section-title {
  font-size: 2.5rem; font-weight: 800; color: #fff;
  margin-bottom: 16px; line-height: 1.3;
}
.section-desc {
  font-size: 1.1rem; color: rgba(255,255,255,0.6);
  max-width: 640px; margin: 0 auto 60px;
}
.text-center { text-align: center; }

/* === Hero === */
.hero {
  padding: 180px 0 120px; text-align: center;
  position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(ellipse at 30% 50%, rgba(0,229,255,0.08) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 50%, rgba(124,77,255,0.08) 0%, transparent 50%);
  animation: heroGlow 8s ease-in-out infinite alternate;
}
@keyframes heroGlow {
  0% { transform: translate(0, 0); }
  100% { transform: translate(-2%, 2%); }
}
.hero-content { position: relative; z-index: 1; }
.hero h1 {
  font-size: 3.5rem; font-weight: 800; color: #fff;
  margin-bottom: 20px; line-height: 1.2;
  background: linear-gradient(135deg, #fff 0%, #00e5ff 50%, #7c4dff 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero .subtitle {
  font-size: 1.25rem; color: rgba(255,255,255,0.7);
  max-width: 600px; margin: 0 auto 40px; line-height: 1.8;
}
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 48px; }
.trust-banner {
  display: flex; gap: 40px; justify-content: center; flex-wrap: wrap;
  padding-top: 40px; border-top: 1px solid rgba(255,255,255,0.08);
}
.trust-item { text-align: center; }
.trust-item .num { font-size: 1.8rem; font-weight: 800; color: #00e5ff; }
.trust-item .label { font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-top: 4px; }

/* === Why Us Cards === */
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.feature-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px; padding: 36px 28px;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0,229,255,0.2);
  box-shadow: 0 12px 40px rgba(0,229,255,0.08);
}
.feature-icon {
  width: 56px; height: 56px; border-radius: 14px;
  background: linear-gradient(135deg, rgba(0,229,255,0.15), rgba(124,77,255,0.15));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; margin-bottom: 20px;
}
.feature-card h3 { font-size: 1.2rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
.feature-card p { font-size: 0.95rem; color: rgba(255,255,255,0.6); line-height: 1.7; }

/* === Global Network === */
.network-stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px;
}
.stat-card {
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px; padding: 32px; text-align: center;
}
.stat-card .stat-num {
  font-size: 2.2rem; font-weight: 800;
  background: linear-gradient(135deg, #00e5ff, #7c4dff);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-card .stat-label { font-size: 0.95rem; color: rgba(255,255,255,0.5); margin-top: 8px; }
.node-map {
  background: rgba(255,255,255,0.02); border: 1px solid rgba(255,255,255,0.06);
  border-radius: 20px; padding: 48px; margin-top: 48px; text-align: center;
  position: relative; overflow: hidden;
}
.node-map::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, rgba(0,229,255,0.05) 0%, transparent 70%);
}
.map-placeholder { position: relative; z-index: 1; }
.map-placeholder h3 { font-size: 1.5rem; color: #fff; margin-bottom: 16px; }
.map-placeholder p { color: rgba(255,255,255,0.5); margin-bottom: 24px; }
.node-cities {
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: center;
}
.node-city {
  padding: 8px 18px; border-radius: 50px;
  background: rgba(0,229,255,0.08); border: 1px solid rgba(0,229,255,0.2);
  font-size: 0.85rem; color: #00e5ff;
}

/* === Platforms === */
.platforms-grid {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px;
}
.platform-card {
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px; padding: 32px 20px; text-align: center;
  transition: transform 0.3s, border-color 0.3s;
}
.platform-card:hover {
  transform: translateY(-4px); border-color: rgba(0,229,255,0.2);
}
.platform-icon { font-size: 2.5rem; margin-bottom: 16px; }
.platform-card h3 { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 8px; }
.platform-card p { font-size: 0.8rem; color: rgba(255,255,255,0.5); margin-bottom: 16px; }
.platform-card .btn-download {
  display: inline-block; padding: 10px 24px; border-radius: 8px;
  background: linear-gradient(135deg, #00e5ff, #7c4dff);
  color: #fff; font-size: 0.85rem; font-weight: 600;
  transition: transform 0.3s, box-shadow 0.3s;
}
.platform-card .btn-download:hover {
  transform: translateY(-1px); box-shadow: 0 4px 15px rgba(0,229,255,0.3);
}

/* === Pricing === */
.pricing-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: start;
}
.pricing-card {
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06);
  border-radius: 20px; padding: 40px 32px; text-align: center;
  transition: transform 0.3s;
}
.pricing-card:hover { transform: translateY(-4px); }
.pricing-card.popular {
  border-color: rgba(0,229,255,0.3);
  background: rgba(0,229,255,0.04);
  transform: scale(1.05);
  position: relative;
}
.pricing-card.popular:hover { transform: scale(1.05) translateY(-4px); }
.popular-badge {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  padding: 6px 24px; border-radius: 50px;
  background: linear-gradient(135deg, #00e5ff, #7c4dff);
  color: #fff; font-size: 0.8rem; font-weight: 700;
}
.pricing-card h3 { font-size: 1.3rem; font-weight: 700; color: #fff; margin-bottom: 8px; }
.pricing-card .price {
  font-size: 2.8rem; font-weight: 800; color: #fff; margin: 16px 0 4px;
}
.pricing-card .price span { font-size: 1rem; font-weight: 400; color: rgba(255,255,255,0.5); }
.pricing-card .price-note { font-size: 0.85rem; color: rgba(255,255,255,0.4); margin-bottom: 24px; }
.pricing-features { text-align: left; margin-bottom: 32px; }
.pricing-features li {
  padding: 8px 0; font-size: 0.9rem; color: rgba(255,255,255,0.7);
  display: flex; align-items: center; gap: 10px;
}
.pricing-features li::before {
  content: '\2713'; color: #00e5ff; font-weight: 700; flex-shrink: 0;
}
.pricing-card .btn-primary { width: 100%; }
.payment-icons {
  display: flex; gap: 16px; justify-content: center; flex-wrap: wrap;
  margin-top: 48px; padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.06);
}
.payment-icon {
  padding: 8px 16px; border-radius: 8px;
  background: rgba(255,255,255,0.05); font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
}

/* === Testimonials === */
.testimonials-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.testimonial-card {
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px; padding: 32px;
}
.testimonial-stars { color: #ffc107; font-size: 0.9rem; margin-bottom: 16px; letter-spacing: 2px; }
.testimonial-text { font-size: 0.95rem; color: rgba(255,255,255,0.7); line-height: 1.8; margin-bottom: 20px; font-style: italic; }
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.testimonial-avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: linear-gradient(135deg, #00e5ff, #7c4dff);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; font-weight: 700; color: #fff;
}
.testimonial-name { font-size: 0.9rem; font-weight: 600; color: #fff; }
.testimonial-role { font-size: 0.8rem; color: rgba(255,255,255,0.4); }

/* === FAQ === */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px; margin-bottom: 12px; overflow: hidden;
}
.faq-question {
  display: block; padding: 20px 24px; font-size: 1rem; font-weight: 600;
  color: #fff; transition: background 0.3s;
}
.faq-question:hover { background: rgba(255,255,255,0.02); }
.faq-answer { padding: 0 24px 20px; font-size: 0.95rem; color: rgba(255,255,255,0.6); line-height: 1.8; }

/* === Footer === */
.site-footer {
  background: rgba(0,0,0,0.3); border-top: 1px solid rgba(255,255,255,0.06);
  padding: 80px 0 32px;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px;
  margin-bottom: 48px;
}
.footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.5); margin-top: 16px; line-height: 1.7; }
.footer-col h4 { font-size: 0.95rem; font-weight: 700; color: #fff; margin-bottom: 20px; }
.footer-col a {
  display: block; padding: 6px 0; font-size: 0.9rem;
  color: rgba(255,255,255,0.5); transition: color 0.3s;
}
.footer-col a:hover { color: #00e5ff; }
.footer-social { display: flex; gap: 12px; margin-top: 20px; }
.footer-social a {
  width: 40px; height: 40px; border-radius: 10px;
  background: rgba(255,255,255,0.05); display: flex;
  align-items: center; justify-content: center;
  font-size: 0.85rem; color: rgba(255,255,255,0.5);
  transition: all 0.3s;
}
.footer-social a:hover { background: rgba(0,229,255,0.15); color: #00e5ff; }
.footer-bottom {
  padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.06);
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px;
}
.footer-bottom p { font-size: 0.85rem; color: rgba(255,255,255,0.4); }
.footer-bottom-links { display: flex; gap: 24px; }
.footer-bottom-links a { font-size: 0.85rem; color: rgba(255,255,255,0.4); transition: color 0.3s; }
.footer-bottom-links a:hover { color: #00e5ff; }

/* === Sub Page Header === */
.page-header {
  padding: 140px 0 60px; text-align: center;
  position: relative;
}
.page-header::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(0,229,255,0.06) 0%, transparent 60%);
}
.page-header h1 {
  font-size: 2.8rem; font-weight: 800; color: #fff;
  margin-bottom: 16px; position: relative;
}
.page-header p {
  font-size: 1.1rem; color: rgba(255,255,255,0.6);
  max-width: 600px; margin: 0 auto; position: relative;
}

/* === Breadcrumb === */
.breadcrumb {
  display: flex; gap: 8px; align-items: center; justify-content: center;
  margin-bottom: 24px; font-size: 0.85rem; color: rgba(255,255,255,0.4);
  position: relative;
}
.breadcrumb a { color: rgba(255,255,255,0.5); transition: color 0.3s; }
.breadcrumb a:hover { color: #00e5ff; }

/* === Content Blocks === */
.content-block {
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px; padding: 40px; margin-bottom: 24px;
}
.content-block h2 { font-size: 1.5rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
.content-block h3 { font-size: 1.2rem; font-weight: 600; color: #fff; margin: 24px 0 12px; }
.content-block p { font-size: 0.95rem; color: rgba(255,255,255,0.65); line-height: 1.8; margin-bottom: 12px; }
.content-block ol { padding-left: 20px; margin: 12px 0; }
.content-block ol li {
  padding: 8px 0; font-size: 0.95rem; color: rgba(255,255,255,0.65);
  line-height: 1.8; list-style: decimal;
}
.content-block ul { padding-left: 20px; margin: 12px 0; }
.content-block ul li {
  padding: 6px 0; font-size: 0.95rem; color: rgba(255,255,255,0.65);
  line-height: 1.8; list-style: disc;
}

/* === Features Detail === */
.feature-detail {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
  padding: 60px 0; border-bottom: 1px solid rgba(255,255,255,0.06);
}
.feature-detail:last-child { border-bottom: none; }
.feature-detail.reverse { direction: rtl; }
.feature-detail.reverse > * { direction: ltr; }
.feature-detail-text h2 { font-size: 1.8rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
.feature-detail-text p { font-size: 1rem; color: rgba(255,255,255,0.6); line-height: 1.8; margin-bottom: 16px; }
.feature-detail-visual {
  background: rgba(255,255,255,0.02); border: 1px solid rgba(255,255,255,0.06);
  border-radius: 20px; padding: 48px; text-align: center;
  min-height: 300px; display: flex; align-items: center; justify-content: center;
}
.feature-detail-visual .visual-icon { font-size: 4rem; }

/* === Team === */
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.team-card {
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px; padding: 32px; text-align: center;
}
.team-avatar {
  width: 80px; height: 80px; border-radius: 50%; margin: 0 auto 16px;
  background: linear-gradient(135deg, rgba(0,229,255,0.2), rgba(124,77,255,0.2));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem; color: #00e5ff;
}
.team-card h3 { font-size: 1.1rem; font-weight: 700; color: #fff; margin-bottom: 4px; }
.team-card .team-role { font-size: 0.85rem; color: #00e5ff; margin-bottom: 12px; }
.team-card p { font-size: 0.85rem; color: rgba(255,255,255,0.5); }

/* === Timeline === */
.timeline { max-width: 700px; margin: 0 auto; position: relative; padding-left: 40px; }
.timeline::before {
  content: ''; position: absolute; left: 15px; top: 0; bottom: 0;
  width: 2px; background: rgba(0,229,255,0.2);
}
.timeline-item { position: relative; margin-bottom: 40px; }
.timeline-item::before {
  content: ''; position: absolute; left: -33px; top: 6px;
  width: 12px; height: 12px; border-radius: 50%;
  background: #00e5ff; border: 3px solid #0a0e27;
}
.timeline-item h3 { font-size: 1.1rem; font-weight: 700; color: #fff; margin-bottom: 4px; }
.timeline-item .time { font-size: 0.85rem; color: #00e5ff; margin-bottom: 8px; }
.timeline-item p { font-size: 0.95rem; color: rgba(255,255,255,0.6); line-height: 1.7; }

/* === Download Page === */
.download-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; max-width: 800px; margin: 0 auto; }
.download-card {
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px; padding: 40px; text-align: center;
  transition: transform 0.3s, border-color 0.3s;
}
.download-card:hover { transform: translateY(-4px); border-color: rgba(0,229,255,0.2); }
.download-card .dl-icon { font-size: 3rem; margin-bottom: 16px; }
.download-card h3 { font-size: 1.3rem; font-weight: 700; color: #fff; margin-bottom: 8px; }
.download-card p { font-size: 0.9rem; color: rgba(255,255,255,0.5); margin-bottom: 20px; }

/* === Help Category === */
.help-categories {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 60px;
}
.help-cat-card {
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px; padding: 32px; text-align: center;
  transition: transform 0.3s, border-color 0.3s;
}
.help-cat-card:hover { transform: translateY(-4px); border-color: rgba(0,229,255,0.2); }
.help-cat-icon { font-size: 2.5rem; margin-bottom: 16px; }
.help-cat-card h3 { font-size: 1.15rem; font-weight: 700; color: #fff; margin-bottom: 8px; }
.help-cat-card p { font-size: 0.9rem; color: rgba(255,255,255,0.5); }

/* === Responsive === */
@media (max-width: 1024px) {
  .features-grid, .testimonials-grid, .help-categories { grid-template-columns: repeat(2, 1fr); }
  .platforms-grid { grid-template-columns: repeat(3, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-card.popular { transform: scale(1.02); }
  .pricing-card.popular:hover { transform: scale(1.02) translateY(-4px); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-detail { grid-template-columns: 1fr; }
  .feature-detail.reverse { direction: ltr; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-menu-btn { display: flex; }
  .hero h1 { font-size: 2.2rem; }
  .hero .subtitle { font-size: 1rem; }
  .section { padding: 80px 0; }
  .section-title { font-size: 1.8rem; }
  .features-grid, .testimonials-grid, .pricing-grid,
  .network-stats, .help-categories { grid-template-columns: 1fr; }
  .platforms-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .trust-banner { gap: 24px; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .page-header h1 { font-size: 2rem; }
  .download-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .pricing-card.popular { transform: none; }
  .pricing-card.popular:hover { transform: translateY(-4px); }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
  .platforms-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.8rem; }
  .header-actions .lang-switch { display: none; }
}