:root {
  --color-bg: #f4f8fb;
  --color-bg-deep: #edf3f8;
  --color-surface: rgba(255, 255, 255, 0.9);
  --color-surface-solid: #ffffff;
  --color-surface-soft: rgba(255, 255, 255, 0.72);
  --color-text: #112236;
  --color-text-soft: #5e7186;
  --color-primary: #2c79b7;
  --color-primary-dark: #1b5b8f;
  --color-primary-soft: rgba(44, 121, 183, 0.08);
  --color-accent: #b73838;
  --color-border: rgba(185, 203, 219, 0.82);
  --color-shadow: 0 18px 50px rgba(17, 34, 54, 0.08);
  --color-shadow-soft: 0 8px 24px rgba(17, 34, 54, 0.05);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --container-width: 1240px;
  --transition: 0.28s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--color-text);
  line-height: 1.65;
  background:
    radial-gradient(circle at top left, rgba(44, 121, 183, 0.08) 0%, transparent 26%),
    radial-gradient(circle at top right, rgba(183, 56, 56, 0.05) 0%, transparent 18%),
    linear-gradient(180deg, #f6f9fc 0%, #edf3f8 100%);
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--color-primary-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button,
input,
textarea {
  font: inherit;
}

.container {
  width: min(100% - 40px, var(--container-width));
  margin: 0 auto;
}

.section {
  padding: 100px 0;
  position: relative;
}

.section-soft {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.42) 0%, rgba(237, 243, 248, 0.9) 100%);
  backdrop-filter: blur(10px);
}

.section-label {
  margin: 0 0 12px;
  color: var(--color-primary);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.78rem;
}

.section-heading {
  max-width: 800px;
  margin-bottom: 44px;
}

.section-heading h2 {
  margin: 0 0 16px;
  font-size: clamp(2.15rem, 3vw, 3.2rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.section-heading p {
  margin: 0;
  color: var(--color-text-soft);
  font-size: 1.04rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(244, 248, 251, 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(185, 203, 219, 0.55);
  box-shadow: 0 4px 18px rgba(17, 34, 54, 0.03);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 84px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--color-text);
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
}

.logo-mark {
  width: 50px;
  height: 50px;
  border-radius: 15px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #2c79b7 0%, #1b5b8f 100%);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.96rem;
  box-shadow: 0 12px 26px rgba(44, 121, 183, 0.22);
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-text strong {
  font-size: 0.99rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.logo-text small {
  color: var(--color-text-soft);
  margin-top: 4px;
  font-size: 0.83rem;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.main-nav a {
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  position: relative;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}

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

.main-nav a:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  padding: 0;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 28px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  border-radius: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  transition:
    transform var(--transition),
    background var(--transition),
    color var(--transition),
    border-color var(--transition),
    box-shadow var(--transition);
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  box-shadow: 0 12px 30px rgba(44, 121, 183, 0.22);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #276ea7 0%, #184e7a 100%);
  box-shadow: 0 14px 34px rgba(44, 121, 183, 0.28);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.7);
  color: var(--color-text);
  border-color: rgba(185, 203, 219, 0.9);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.96);
  border-color: rgba(44, 121, 183, 0.32);
}

.hero {
  padding-top: 86px;
}

.hero-shell {
  position: relative;
}

.hero-shell::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 18% 20%, rgba(44, 121, 183, 0.08) 0%, transparent 24%),
    radial-gradient(circle at 82% 18%, rgba(183, 56, 56, 0.05) 0%, transparent 18%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 44px;
  align-items: center;
  z-index: 1;
}

.hero-content h1 {
  margin: 0 0 22px;
  font-size: clamp(2.7rem, 4vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
  max-width: 920px;
}

.hero-text {
  margin: 0 0 30px;
  color: var(--color-text-soft);
  font-size: 1.08rem;
  max-width: 720px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 28px;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-points span {
  padding: 11px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(185, 203, 219, 0.82);
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.93rem;
  box-shadow: var(--color-shadow-soft);
  backdrop-filter: blur(10px);
}

.hero-panel {
  display: grid;
  gap: 18px;
}

.hero-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96) 0%, rgba(244, 248, 252, 0.9) 100%);
  border: 1px solid rgba(185, 203, 219, 0.76);
  border-radius: var(--radius-xl);
  box-shadow: var(--color-shadow);
  backdrop-filter: blur(12px);
}

.hero-card-main {
  padding: 30px;
  position: relative;
  overflow: hidden;
}

.hero-card-main::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(44, 121, 183, 0.09) 0%, transparent 36%),
    radial-gradient(circle at top right, rgba(44, 121, 183, 0.13) 0%, transparent 24%);
  pointer-events: none;
}

.hero-card-main::after {
  content: "";
  position: absolute;
  width: 180px;
  height: 180px;
  right: -60px;
  bottom: -60px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(183, 56, 56, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-card-top {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 28px;
  font-weight: 700;
  z-index: 1;
}

.hero-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 8px rgba(183, 56, 56, 0.08);
}

.hero-lines {
  position: relative;
  display: grid;
  gap: 14px;
  margin-bottom: 28px;
  z-index: 1;
}

.hero-lines span {
  display: block;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(44, 121, 183, 0.92) 0%, rgba(44, 121, 183, 0.16) 100%);
}

.hero-lines span:nth-child(2) {
  width: 84%;
}

.hero-lines span:nth-child(3) {
  width: 92%;
}

.hero-stats {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  z-index: 1;
}

.hero-stat {
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(185, 203, 219, 0.72);
  border-radius: 18px;
  padding: 16px;
  text-align: center;
  box-shadow: var(--color-shadow-soft);
  backdrop-filter: blur(10px);
}

.hero-stat strong {
  display: block;
  font-size: 1.12rem;
  color: var(--color-primary-dark);
  margin-bottom: 6px;
}

.hero-stat small {
  color: var(--color-text-soft);
  font-size: 0.82rem;
}

.hero-note {
  padding: 22px 24px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(185, 203, 219, 0.72);
  border-radius: 20px;
  box-shadow: var(--color-shadow-soft);
  backdrop-filter: blur(10px);
}

.hero-note p {
  margin: 0;
  color: var(--color-text-soft);
}

.about-premium-grid,
.service-grid,
.advantage-grid,
.guarantees-grid,
.contacts-grid {
  display: grid;
  gap: 20px;
}

.about-premium-grid,
.service-grid {
  grid-template-columns: repeat(3, 1fr);
}

.advantage-grid,
.guarantees-grid,
.contacts-grid {
  grid-template-columns: repeat(2, 1fr);
}

.info-card,
.service-card,
.advantage-card,
.guarantee-item,
.contact-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--color-shadow);
  backdrop-filter: blur(12px);
  padding: 30px;
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    border-color var(--transition);
}

.info-card:hover,
.service-card:hover,
.advantage-card:hover,
.guarantee-item:hover,
.contact-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 48px rgba(17, 34, 54, 0.10);
  border-color: rgba(44, 121, 183, 0.26);
}

.info-card h3,
.service-card h3,
.advantage-card h3,
.guarantee-item h3,
.contact-card h3 {
  margin-top: 0;
  margin-bottom: 14px;
  font-size: 1.18rem;
  line-height: 1.28;
  letter-spacing: -0.01em;
}

.info-card p,
.service-card p,
.advantage-card p,
.guarantee-item p,
.contact-card p {
  margin: 0;
  color: var(--color-text-soft);
}

.service-card ul {
  margin: 18px 0 0;
  padding-left: 18px;
  color: var(--color-text-soft);
}

.service-card li + li {
  margin-top: 8px;
}

.card-icon {
  width: 50px;
  height: 50px;
  margin-bottom: 18px;
  border-radius: 15px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, #f4f9fd 0%, #e4eff8 100%);
  color: var(--color-primary-dark);
  font-weight: 700;
  box-shadow: inset 0 0 0 1px rgba(185, 203, 219, 0.72);
}

.premium-grid article {
  position: relative;
}

.faq-list {
  display: grid;
  gap: 16px;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--color-shadow-soft);
  backdrop-filter: blur(10px);
}

.faq-question {
  width: 100%;
  padding: 22px 24px;
  border: 0;
  background: transparent;
  text-align: left;
  font-weight: 700;
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-question span {
  color: var(--color-primary);
  font-size: 1.25rem;
  line-height: 1;
  margin-left: 16px;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition), padding var(--transition);
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 240px;
  padding: 0 24px 22px;
}

.faq-answer p {
  margin: 0;
  color: var(--color-text-soft);
}

.site-footer {
  background: linear-gradient(180deg, #122131 0%, #0e1b28 100%);
  color: #dce7f0;
  padding-top: 34px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 20px;
}

.footer-brand {
  max-width: 620px;
}

.footer-brand p {
  color: #b7c7d7;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-content: flex-start;
}

.footer-links a {
  color: #ffffff;
  text-decoration: none;
  position: relative;
}

.footer-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.85);
  transition: width var(--transition);
}

.footer-links a:hover {
  color: #edf4fb;
}

.footer-links a:hover::after {
  width: 100%;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.10);
  padding: 18px 0 28px;
}

.footer-bottom p {
  margin: 0;
  color: #b7c7d7;
  font-size: 0.92rem;
}

.scroll-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 50px;
  height: 50px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 14px;
  background: linear-gradient(135deg, #1b5b8f 0%, #143f63 100%);
  color: #ffffff;
  font-size: 1rem;
  cursor: pointer;
  box-shadow: 0 12px 28px rgba(20, 33, 47, 0.18);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition:
    opacity var(--transition),
    transform var(--transition),
    visibility var(--transition),
    box-shadow var(--transition);
  z-index: 999;
}

.scroll-top:hover {
  box-shadow: 0 16px 34px rgba(20, 33, 47, 0.24);
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.68s ease, transform 0.68s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .hero-grid,
  .about-premium-grid,
  .service-grid {
    grid-template-columns: 1fr;
  }

  .advantage-grid,
  .guarantees-grid,
  .contacts-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 920px) {
  .main-nav {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .main-nav.is-open {
    display: block;
    position: absolute;
    top: 84px;
    left: 16px;
    right: 16px;
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid var(--color-border);
    border-radius: 18px;
    box-shadow: var(--color-shadow);
    padding: 16px;
    backdrop-filter: blur(12px);
  }

  .main-nav.is-open ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .advantage-grid,
  .guarantees-grid,
  .contacts-grid,
  .hero-stats {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 78px 0;
  }

  .hero-content h1 {
    font-size: clamp(2.1rem, 8vw, 3.5rem);
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 24px, var(--container-width));
  }

  .header-inner {
    min-height: 76px;
  }

  .logo-text small {
    display: none;
  }

  .section-heading h2 {
    font-size: 1.9rem;
  }

  .hero-points {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .info-card,
  .service-card,
  .advantage-card,
  .guarantee-item,
  .contact-card,
  .hero-card-main,
  .hero-note {
    padding: 22px;
  }
}