:root {
  --bg: #f4f7fc;
  --surface: #ffffff;
  --surface-soft: #f0f4ff;
  --text: #1b2540;
  --muted: #5f6b85;
  --primary: #0d4eb3;
  --primary-2: #1b74e8;
  --accent: #0ca678;
  --border: #d7e0f2;
  --shadow: 0 16px 32px rgba(12, 44, 97, 0.12);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: "Inter", sans-serif;
  background: var(--bg);
  color: var(--text);
  scroll-behavior: smooth;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.section {
  padding: 84px 0;
}

.section-alt {
  background: linear-gradient(180deg, #f8faff 0%, #eef3ff 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand strong {
  display: block;
  font-size: 1rem;
}

.brand span {
  color: var(--muted);
  font-size: 0.82rem;
}

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.main-nav a {
  font-weight: 500;
}

.menu-toggle {
  display: none;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 10px;
  font-size: 1.3rem;
  padding: 8px 10px;
}

.hero {
  padding: 64px 0 56px;
  background: radial-gradient(circle at top right, #dbe8ff 0%, #f7f9ff 45%, #f4f7fc 80%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 34px;
}

.tag {
  display: inline-block;
  background: #e9f1ff;
  color: var(--primary);
  border: 1px solid #c9dcff;
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  font-weight: 700;
}

.hero h1 {
  margin: 14px 0;
  font-size: clamp(2rem, 3.6vw, 3.1rem);
  line-height: 1.15;
}

.hero-text {
  color: var(--muted);
  line-height: 1.7;
  font-size: 1.05rem;
}

.hero-actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions.center {
  justify-content: center;
}

.hero-list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  color: #2b3856;
}

.hero-media {
  position: relative;
}

.hero-media img {
  min-height: 430px;
  object-fit: cover;
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.hero-card {
  position: absolute;
  left: 16px;
  bottom: 16px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  box-shadow: var(--shadow);
}

.hero-card span,
.hero-card small {
  display: block;
  color: var(--muted);
}

.hero-card strong {
  font-size: 1.12rem;
}

.section-head {
  max-width: 760px;
  margin-bottom: 26px;
}

.section-head h2 {
  margin: 12px 0 0;
  font-size: clamp(1.55rem, 2.8vw, 2.3rem);
}

.cards-grid {
  display: grid;
  gap: 16px;
}

.cards-grid.four {
  grid-template-columns: repeat(4, 1fr);
}

.cards-grid.three {
  grid-template-columns: repeat(3, 1fr);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

.card h3 {
  margin-top: 0;
}

.card p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.65;
}

.icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--surface-soft);
  border: 1px solid var(--border);
  margin-bottom: 12px;
  font-size: 1.2rem;
}

.split-grid {
  display: grid;
  grid-template-columns: 1.04fr 0.96fr;
  gap: 24px;
  align-items: start;
}

.split-grid p {
  color: var(--muted);
  line-height: 1.7;
}

.check-list {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  display: grid;
  gap: 10px;
}

.check-list li::before {
  content: "✔";
  color: var(--accent);
  margin-right: 8px;
}

.highlight-box {
  background: linear-gradient(180deg, #ffffff 0%, #f5f8ff 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.highlight-box ul {
  padding-left: 18px;
  color: var(--muted);
}

.highlight-box hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 12px 0;
}

.authority {
  background: linear-gradient(130deg, #0d4eb3, #1a68da);
  color: #fff;
}

.authority-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.authority-grid article {
  background: rgba(255, 255, 255, 0.11);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 14px;
  padding: 20px;
}

.authority-grid p {
  margin-bottom: 0;
}

.faq-list {
  display: grid;
  gap: 12px;
}

details {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
}

summary {
  font-weight: 600;
  cursor: pointer;
}

details p {
  color: var(--muted);
  margin: 10px 0 0;
}

.cta-box {
  background: linear-gradient(180deg, #ffffff 0%, #f3f7ff 100%);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
  text-align: center;
  padding: 34px 22px;
}

.site-footer {
  margin-top: 10px;
  background: #0c1426;
  color: #dbe4ff;
  padding: 56px 0 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1fr;
  gap: 20px;
}

.footer-grid h3,
.footer-grid h4 {
  color: #fff;
  margin-top: 0;
}

.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  margin-top: 24px;
  padding-top: 14px;
  display: flex;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 0.92rem;
}

.btn {
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 12px 18px;
  font-weight: 700;
  transition: 0.25s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-small {
  padding: 8px 14px;
  font-size: 0.9rem;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  box-shadow: 0 12px 22px rgba(24, 92, 198, 0.3);
}

.btn-secondary {
  background: #fff;
  border-color: var(--border);
}

.btn-outline {
  border-color: #aebddd;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  font: inherit;
  margin: 7px 0 14px;
}

@media (max-width: 1040px) {
  .hero-grid,
  .split-grid {
    grid-template-columns: 1fr;
  }

  .cards-grid.four,
  .cards-grid.three {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 760px) {
  .menu-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: absolute;
    top: 78px;
    right: 4%;
    width: min(260px, 92vw);
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 14px;
    box-shadow: var(--shadow);
  }

  .main-nav.active {
    display: flex;
  }

  .cards-grid.four,
  .cards-grid.three,
  .authority-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 68px 0;
  }
}