@charset "utf-8";

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: #999;
  background: #000;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

ul, li { list-style: none; }
img { border: 0; display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { background: none; border: none; cursor: pointer; font: inherit; color: inherit; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 40px; }

/* Shared card base */
.card {
  border: 1px solid #1a1a1a;
  border-radius: 12px;
  transition: border-color 0.3s;
}
.card:hover { border-color: #333; }

/* Shared card header */
.card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid #1a1a1a;
}
.card-header h3 { font-size: 16px; font-weight: 600; color: #fff; }

/* Shared bullet list */
.bullet-list { padding: 0; }
.bullet-list li {
  font-size: 14px;
  line-height: 2;
  color: #888;
  padding-left: 16px;
  position: relative;
}
.bullet-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 13px;
  width: 5px;
  height: 5px;
  background: #444;
  border-radius: 50%;
}

.muted { color: #555; }
.section-title { font-size: 28px; font-weight: 700; text-align: center; color: #fff; padding: 80px 0 50px; }
.section-divider { width: 60px; height: 1px; background: #222; margin: 40px auto; }

/* Header */
.header {
  position: fixed; width: 100%; height: 72px;
  padding: 0 48px; z-index: 100; top: 0; left: 0;
  transition: background 0.3s;
  border-bottom: 1px solid transparent;
}
.header.scrolled { background: rgba(0,0,0,0.95); border-bottom-color: #1a1a1a; }
.header-inner { max-width: 1400px; margin: 0 auto; display: flex; align-items: center; height: 100%; }
.logo { flex-shrink: 0; }
.logo img { height: 56px; width: auto; }
#loutiNav { margin-left: 80px; }
#loutiNav ul { display: flex; gap: 48px; }
#loutiNav button {
  font-size: 13px; font-weight: 600; letter-spacing: 0.12em;
  color: #666; padding: 24px 0; position: relative; transition: color 0.3s;
}
#loutiNav button::after {
  content: ""; position: absolute; bottom: 0; left: 0;
  width: 0; height: 1px; background: #fff; transition: width 0.3s;
}
#loutiNav button:hover { color: #ccc; }
#loutiNav button.active { color: #fff; }
#loutiNav button.active::after { width: 100%; }

/* Hero */
.hero { position: relative; width: 100%; height: 100vh; min-height: 700px; overflow: hidden; }
.hero-bg { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-bg::after {
  content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background: linear-gradient(180deg, rgba(0,0,0,0) 30%, rgba(0,0,0,0.85) 75%, #000 100%);
}
.hero-content {
  position: absolute; bottom: 100px; left: 50%; transform: translateX(-50%);
  z-index: 1; text-align: center; width: 100%; max-width: 860px; padding: 0 40px;
}
.hero-desc { font-size: 17px; line-height: 1.9; color: #bbb; max-width: 700px; margin: 0 auto; }

/* Stats */
.stats-bar { background: #0a0a0a; border-top: 1px solid #111; border-bottom: 1px solid #111; padding: 48px 0; }
.stats-grid { display: flex; align-items: center; justify-content: center; }
.stat-item { flex: 1; text-align: center; }
.stat-num { display: block; font-size: 42px; font-weight: 700; color: #fff; letter-spacing: -0.02em; margin-bottom: 8px; }
.stat-label { display: block; font-size: 13px; color: #555; letter-spacing: 0.05em; text-transform: uppercase; }
.stat-divider { width: 1px; height: 50px; background: #1a1a1a; flex-shrink: 0; }

/* Intro */
.intro-section { padding: 80px 0; }
.intro-grid { display: flex; gap: 32px; }
.intro-card { flex: 1; padding: 44px 36px; text-align: center; }
.intro-icon-wrap {
  width: 72px; height: 72px; margin: 0 auto 24px;
  background: #111; border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
}
.intro-icon-wrap img { width: 40px; height: 40px; filter: grayscale(1) brightness(1.5); }
.intro-card h3 { font-size: 20px; font-weight: 600; color: #fff; margin-bottom: 16px; }
.intro-card p { font-size: 15px; line-height: 1.8; color: #777; }

/* Features */
.features-section { padding-bottom: 100px; border-top: 1px solid #111; }
.features-grid { display: flex; flex-wrap: wrap; gap: 24px; }
.feature-card { flex: 1 1 calc(50% - 12px); min-width: 300px; padding: 36px 32px; }
.feature-icon {
  width: 56px; height: 56px; display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px; background: #111; border-radius: 12px;
}
.feature-icon img { width: 32px; height: 32px; object-fit: contain; filter: grayscale(1) brightness(1.5); }
.feature-card h3 { font-size: 18px; font-weight: 600; color: #fff; margin-bottom: 10px; }
.feature-card p { font-size: 14px; line-height: 1.8; color: #777; }

/* Coverage */
.coverage-section { padding-bottom: 80px; border-top: 1px solid #111; }
.coverage-cards { display: flex; gap: 24px; }
.coverage-card { flex: 1; padding: 32px 28px; }
.coverage-card p { font-size: 14px; line-height: 2; color: #888; }
.coverage-card .card-header h3 { font-size: 18px; }

/* Connectivity */
.conn-grid { display: flex; flex-wrap: wrap; gap: 20px; }
.conn-card { flex: 1 1 calc(33.333% - 14px); min-width: 250px; padding: 32px 28px; text-align: center; }
.conn-card svg { margin: 0 auto 16px; opacity: 0.7; }
.conn-card h4 { font-size: 16px; font-weight: 600; color: #fff; margin-bottom: 8px; }
.conn-card p { font-size: 13px; line-height: 1.7; color: #666; }

/* Execution */
.execution-section { padding-bottom: 80px; border-top: 1px solid #111; }
.exec-grid { display: flex; flex-wrap: wrap; gap: 20px; }
.exec-block { flex: 1 1 calc(50% - 10px); min-width: 300px; padding: 32px 28px; }

/* Contact */
.contact-section { text-align: center; padding: 120px 0 160px; border-top: 1px solid #111; }
.contact-title { font-size: 28px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.contact-subtitle { font-size: 16px; color: #555; margin-bottom: 40px; }
.contact-btn {
  display: inline-block; font-size: 15px; font-weight: 600; color: #000; background: #fff;
  padding: 14px 48px; border-radius: 8px; transition: opacity 0.3s, transform 0.3s;
}
.contact-btn:hover { opacity: 0.85; transform: translateY(-2px); }
.contact-email { font-size: 14px; color: #555; margin-top: 24px; }
.contact-location { font-size: 14px; color: #444; margin-top: 8px; }

/* Responsive */
@media (max-width: 1024px) {
  .header { padding: 0 24px; }
  #loutiNav { margin-left: 40px; }
  #loutiNav ul { gap: 28px; }
  .container { padding: 0 24px; }
  .conn-card { flex: 1 1 calc(50% - 10px); }
}
@media (max-width: 768px) {
  #loutiNav { display: none; }
  .hero { min-height: 550px; }
  .hero-desc { font-size: 15px; }
  .stats-grid { flex-wrap: wrap; gap: 24px; }
  .stat-divider { display: none; }
  .stat-item { flex: 1 1 45%; }
  .intro-grid { flex-direction: column; }
  .feature-card, .exec-block, .conn-card { flex: 1 1 100%; }
  .coverage-cards { flex-direction: column; }
  .section-title { font-size: 22px; padding: 60px 0 36px; }
  .contact-btn { font-size: 14px; padding: 12px 36px; }
  .contact-section { padding: 80px 0 120px; }
}