* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'DM Sans', Arial, sans-serif;
  background: #f5f8fc;
  color: #243955;
  line-height: 1.7;
}

.site-header {
  background: #fff;
  border-bottom: 1px solid #e5ebf4;
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo img {
  width: 32px;
  height: 32px;
}

.logo span {
  color: #12233c;
  font-size: 18px;
  font-weight: 700;
}

.top-nav {
  display: flex;
  gap: 20px;
}

.top-nav a {
  color: #4e6382;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
}

.top-nav a:hover {
  color: #1a73ff;
}

.hero {
  padding: 56px 20px 34px;
  background: linear-gradient(135deg, #e9f1ff, #f5f9ff);
  border-bottom: 1px solid #dce8fb;
}

.hero-inner {
  max-width: 920px;
  margin: 0 auto;
}

.hero h1 {
  margin: 0 0 10px;
  font-size: 2rem;
  line-height: 1.25;
  color: #1c3352;
}

.hero p {
  margin: 0;
  color: #4d6383;
  font-size: 1rem;
}

.page-content {
  max-width: 920px;
  margin: 28px auto 54px;
  padding: 0 20px;
}

.card {
  background: #fff;
  border: 1px solid #dfe8f4;
  border-radius: 12px;
  padding: 28px;
  margin-bottom: 16px;
}

.card h2 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 1.35rem;
  color: #1e3656;
}

.card h3 {
  margin-top: 20px;
  margin-bottom: 8px;
  color: #254165;
  font-size: 1.05rem;
}

.card p,
.card li {
  color: #4f6584;
  font-size: 0.98rem;
}

.card ul {
  margin: 0;
  padding-left: 20px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label {
  font-size: 13px;
  color: #3f5676;
  font-weight: 600;
}

.field input,
.field textarea {
  border: 1px solid #cfdced;
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
  color: #23395a;
}

.field textarea {
  min-height: 140px;
  resize: vertical;
}

.form-actions {
  margin-top: 12px;
}

.btn {
  border: 1px solid #2c74ea;
  background: #498cfe;
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  border-radius: 8px;
  padding: 10px 16px;
  cursor: pointer;
}

.btn:hover {
  background: #2b76ef;
}

.notice {
  border-left: 4px solid #2c74ea;
  background: #edf4ff;
  padding: 12px 14px;
  border-radius: 0 8px 8px 0;
}

.main-footer {
  background: #1f2430;
  color: #d4deec;
  padding: 42px 0 20px;
  border-top: 1px solid #151a24;
}

.footer-wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.45fr 1fr 1fr 1fr;
  gap: 24px;
}

.main-footer h3,
.main-footer h4 {
  margin: 0 0 10px;
  color: #fff;
}

.main-footer p,
.main-footer li {
  color: #b8c1cf;
  line-height: 1.75;
  font-size: 15px;
}

.main-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-footer a {
  color: #b8c1cf;
  font-size: 15px;
  text-decoration: none;
}

.main-footer a:hover {
  color: #fff;
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid #30384a;
  margin-top: 20px;
  padding-top: 12px;
  text-align: center;
  font-size: 12px;
}

.footer-bottom p {
  margin: 0;
}

@media (max-width: 768px) {
  .top-nav {
    display: none;
  }

  .hero h1 {
    font-size: 1.6rem;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}