diff --git a/assets/images/.gitkeep b/assets/images/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/assets/images/logo-full-dark.png b/assets/images/logo-full-dark.png
new file mode 100644
index 0000000..e7a08ee
Binary files /dev/null and b/assets/images/logo-full-dark.png differ
diff --git a/assets/images/logo-full-white.png b/assets/images/logo-full-white.png
new file mode 100644
index 0000000..2a518ab
Binary files /dev/null and b/assets/images/logo-full-white.png differ
diff --git a/assets/images/logo-icon.ico b/assets/images/logo-icon.ico
new file mode 100644
index 0000000..ca58b25
Binary files /dev/null and b/assets/images/logo-icon.ico differ
diff --git a/css/styles.css b/css/styles.css
index 849037a..a56e4cc 100644
--- a/css/styles.css
+++ b/css/styles.css
@@ -55,24 +55,31 @@ a {
 }
 
 .logo {
-  font-weight: 800;
-  letter-spacing: 0.08em;
-  text-transform: uppercase;
+  display: inline-flex;
+  align-items: center;
+  line-height: 0;
   color: var(--hero-text);
 }
 
-.logo--header {
-  font-size: clamp(1.1rem, 2vw, 1.35rem);
+.logo__img {
+  display: block;
+  height: auto;
+  max-width: 100%;
+}
+
+.logo--header .logo__img {
+  height: clamp(1.35rem, 3.2vw, 1.85rem);
+  width: auto;
 }
 
 .logo--hero {
-  font-size: clamp(3.5rem, 10vw, 7.5rem);
-  line-height: 0.95;
   margin: 0 0 2rem;
-  background: linear-gradient(135deg, #fff 0%, #d4c8ff 55%, #9e8cff 100%);
-  -webkit-background-clip: text;
-  background-clip: text;
-  color: transparent;
+  max-width: min(100%, 28rem);
+}
+
+.logo--hero .logo__img {
+  width: 100%;
+  height: auto;
 }
 
 .nav {
diff --git a/favicon.svg b/favicon.svg
new file mode 100644
index 0000000..2077b66
--- /dev/null
+++ b/favicon.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32"><defs><linearGradient id="a" x1="0" y1="0" x2="1" y2="1"><stop offset="0%" stop-color="#1e0f3d"/><stop offset="100%" stop-color="#5c47c4"/></linearGradient></defs><rect width="32" height="32" rx="8" fill="url(#a)"/></svg>
diff --git a/index.html b/index.html
index 7b9ba66..06dd80e 100644
--- a/index.html
+++ b/index.html
@@ -4,15 +4,38 @@
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title>ЭКСА — ваш мост в мир цифровых активов</title>
+<meta name="description" content="ЭКСА — финтех-компания: мост в мир цифровых активов. Прозрачный и законный оборот криптовалют и цифровых активов для компаний и частных клиентов.">
+<meta name="robots" content="index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1">
+<meta name="theme-color" content="#070b28">
+<link rel="canonical" href="https://elcsa.ru/">
+<link rel="icon" href="assets/images/logo-icon.ico" sizes="any">
+<link rel="apple-touch-icon" href="assets/images/logo-icon.ico">
+<link rel="icon" href="favicon.svg" type="image/svg+xml">
+<link rel="alternate" hreflang="ru-RU" href="https://elcsa.ru/">
+<link rel="alternate" hreflang="x-default" href="https://elcsa.ru/">
+<meta property="og:type" content="website">
+<meta property="og:locale" content="ru_RU">
+<meta property="og:url" content="https://elcsa.ru/">
+<meta property="og:site_name" content="ЭКСА">
+<meta property="og:title" content="ЭКСА — ваш мост в мир цифровых активов">
+<meta property="og:description" content="ЭКСА — финтех-компания: мост в мир цифровых активов. Прозрачный и законный оборот криптовалют и цифровых активов для компаний и частных клиентов.">
+<meta name="twitter:card" content="summary_large_image">
+<meta name="twitter:title" content="ЭКСА — ваш мост в мир цифровых активов">
+<meta name="twitter:description" content="ЭКСА — финтех-компания: мост в мир цифровых активов. Прозрачный и законный оборот криптовалют и цифровых активов для компаний и частных клиентов.">
+<script type="application/ld+json">
+{"@context":"https://schema.org","@type":"Organization","name":"ООО «ЭКСА»","url":"https://elcsa.ru/","email":"company@elcsa.ru","telephone":"+7-812-123-33-23","identifier":[{"@type":"PropertyValue","name":"ИНН","value":"9810001062"},{"@type":"PropertyValue","name":"ОГРН","value":"1257800060990"}],"address":{"@type":"PostalAddress","postalCode":"196158","addressLocality":"Санкт-Петербург","streetAddress":"Московское шоссе, 25А, к.1, ПОМЕЩ. 3-Н","addressCountry":"RU"}}
+</script>
 <link rel="preconnect" href="https://fonts.googleapis.com">
 <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
 <link href="https://fonts.googleapis.com/css2?family=Manrope:wght@300;400;500;600;700;800&family=Nunito+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap" rel="stylesheet">
 <link rel="stylesheet" href="css/styles.css">
 </head>
 <body>
+<script src="js/site-config.js"></script>
+<script src="js/tracking.js"></script>
 <header class="header" id="top">
 <div class="header__inner">
-<a class="logo logo--header" href="#top">ЭКСА</a>
+<a class="logo logo--header" href="#top"><img class="logo__img" src="assets/images/logo-full-white.png" alt="ЭКСА" width="160" height="48" decoding="async"></a>
 <nav class="nav">
 <a class="nav__link" href="#about">О нас</a>
 <a class="nav__link" href="#top">Конвертация</a>
@@ -32,7 +55,7 @@
 <div class="hero__glow hero__glow--3" aria-hidden="true">Ξ</div>
 <div class="hero__grid">
 <div class="hero__left">
-<div class="logo logo--hero">ЭКСА</div>
+<div class="logo logo--hero"><img class="logo__img" src="assets/images/logo-full-white.png" alt="ЭКСА" width="520" height="160" decoding="async"></div>
 <p class="hero__acronym">
 <span>Электронные</span>
 <span>Криптовалютные</span>
@@ -137,6 +160,6 @@
 </div>
 </footer>
 
-<script src="js/main.js"></script>
+<script src="js/main.js" defer></script>
 </body>
 </html>
diff --git a/js/site-config.js b/js/site-config.js
new file mode 100644
index 0000000..3832616
--- /dev/null
+++ b/js/site-config.js
@@ -0,0 +1,8 @@
+window.__SITE_CONFIG__ = {
+  siteUrl: 'https://elcsa.ru',
+  gtmContainerId: '',
+  ga4MeasurementId: '',
+  googleAdsId: '',
+  yandexMetrikaId: '',
+  yandexWebvisor: true,
+};
diff --git a/js/tracking.js b/js/tracking.js
new file mode 100644
index 0000000..b592d17
--- /dev/null
+++ b/js/tracking.js
@@ -0,0 +1,84 @@
+function injectGtm(id) {
+  const w = window;
+  w.dataLayer = w.dataLayer || [];
+  w.dataLayer.push({ 'gtm.start': Date.now(), event: 'gtm.js' });
+  const firstScript = document.getElementsByTagName('script')[0];
+  const gtmScript = document.createElement('script');
+  gtmScript.async = true;
+  gtmScript.src = 'https://www.googletagmanager.com/gtm.js?id=' + id;
+  firstScript.parentNode.insertBefore(gtmScript, firstScript);
+  const nos = document.createElement('noscript');
+  const iframe = document.createElement('iframe');
+  iframe.src = 'https://www.googletagmanager.com/ns.html?id=' + id;
+  iframe.height = '0';
+  iframe.width = '0';
+  iframe.setAttribute('style', 'display:none;visibility:hidden');
+  nos.appendChild(iframe);
+  document.body.insertBefore(nos, document.body.firstChild);
+}
+
+
+function injectGtag(ids) {
+  const list = ids.filter(Boolean);
+  if (!list.length) {
+    return;
+  }
+  const s = document.createElement('script');
+  s.async = true;
+  s.src = 'https://www.googletagmanager.com/gtag/js?id=' + list[0];
+  document.head.appendChild(s);
+  window.dataLayer = window.dataLayer || [];
+  function gtag() {
+    window.dataLayer.push(arguments);
+  }
+  window.gtag = gtag;
+  gtag('js', new Date());
+  list.forEach((id) => {
+    gtag('config', id);
+  });
+}
+
+
+function injectYandex(id, webvisor) {
+  if (!id) {
+    return;
+  }
+  (function (m, e, t, r, i, k, a) {
+    m[i] =
+      m[i] ||
+      function () {
+        (m[i].a = m[i].a || []).push(arguments);
+      };
+    m[i].l = 1 * new Date();
+    for (let j = 0; j < document.scripts.length; j += 1) {
+      if (document.scripts[j].src === r) {
+        return;
+      }
+    }
+    k = e.createElement(t);
+    a = e.getElementsByTagName(t)[0];
+    k.async = 1;
+    k.src = r;
+    a.parentNode.insertBefore(k, a);
+  })(window, document, 'script', 'https://mc.yandex.ru/metrika/tag.js', 'ym');
+  window.ym(id, 'init', {
+    clickmap: true,
+    trackLinks: true,
+    accurateTrackBounce: true,
+    webvisor: !!webvisor,
+  });
+}
+
+
+function runTracking() {
+  const c = window.__SITE_CONFIG__ || {};
+  if (c.gtmContainerId) {
+    injectGtm(c.gtmContainerId);
+  } else {
+    injectGtag([c.ga4MeasurementId, c.googleAdsId].filter(Boolean));
+  }
+  injectYandex(c.yandexMetrikaId, c.yandexWebvisor);
+}
+
+
+runTracking();
diff --git a/robots.txt b/robots.txt
new file mode 100644
index 0000000..7bf9035
--- /dev/null
+++ b/robots.txt
@@ -0,0 +1,4 @@
+User-agent: *
+Allow: /
+
+Sitemap: https://elcsa.ru/sitemap.xml
diff --git a/sitemap.xml b/sitemap.xml
new file mode 100644
index 0000000..3e800fe
--- /dev/null
+++ b/sitemap.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+  <url>
+    <loc>https://elcsa.ru/</loc>
+    <changefreq>weekly</changefreq>
+    <priority>1.0</priority>
+  </url>
+</urlset>