:root {
  --bg-main: #f5f7fb;
  --bg-soft: #d9ecff;
  --bg-dark: #16191f;
  --text-main: #1d2633;
  --text-muted: #5b6677;
  --accent: #f2662f;
  --accent-dark: #cf4f1d;
  --card: #ffffff;
  --border: #e5eaf1;
  --max-width: 1120px;
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background: var(--bg-main);
  color: var(--text-main);
}

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

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

.container {
  width: min(100% - 2rem, var(--max-width));
  margin: 0 auto;
}

.site-header {
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 74px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
}

.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  object-fit: cover;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.menu-toggle {
  display: none;
  border: 1px solid #cfd8e5;
  background: #fff;
  border-radius: 10px;
  width: 42px;
  height: 42px;
  padding: 0;
}

.menu-toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  background: #1d2633;
  margin: 4px auto;
}

.site-nav a {
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 0.94rem;
}

.site-nav a.current {
  background: #eef5ff;
  color: #1a5cad;
  font-weight: 600;
}

.hero {
  padding: 4.2rem 0 3rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 2rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  line-height: 1.1;
}

.hero p {
  color: var(--text-muted);
  line-height: 1.65;
  margin: 1rem 0 1.25rem;
}

.btn {
  display: inline-block;
  padding: 0.8rem 1.15rem;
  border-radius: 10px;
  border: 2px solid var(--accent-dark);
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
}

.hero-art {
  background: radial-gradient(circle at 30% 30%, #fefefe, #e6edf6);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 1rem;
}

.hero-art img {
  border-radius: 16px;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.section {
  padding: 3.2rem 0;
}

.section-blue {
  background: var(--bg-soft);
}

.section-dark {
  background: var(--bg-dark);
  color: #fff;
}

.section h2 {
  margin: 0 0 0.7rem;
  text-align: center;
  font-size: clamp(1.35rem, 3vw, 2rem);
}

.section-intro {
  margin: 0 auto 1.8rem;
  text-align: center;
  color: var(--text-muted);
  max-width: 780px;
  line-height: 1.65;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
}

.feature-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 0.7rem;
  border-radius: 50%;
  background: #ffe2d8;
  color: #cf4f1d;
  display: grid;
  place-items: center;
  font-weight: 800;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.step-card {
  border: 1px solid #2c3241;
  border-radius: var(--radius);
  background: #1e2330;
  padding: 1.2rem;
  text-align: center;
}

.step-number {
  font-size: 2rem;
  font-weight: 900;
  color: #ff8a5f;
  margin-bottom: 0.4rem;
}

.article-wrap {
  background: #fff;
  border-radius: 18px;
  border: 1px solid var(--border);
  padding: 1.4rem;
}

.article-wrap h2,
.article-wrap h3 {
  text-align: left;
}

.article-wrap h3 {
  margin-top: 1.2rem;
  margin-bottom: 0.4rem;
}

.article-wrap p,
.article-wrap li {
  color: #334155;
  line-height: 1.7;
}

.article-wrap ul {
  margin-top: 0.4rem;
}

.interlinks {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.3rem;
}

.interlinks a {
  background: #ecf4ff;
  border: 1px solid #cfe3ff;
  color: #1c4e87;
  font-size: 0.9rem;
  border-radius: 999px;
  padding: 0.45rem 0.75rem;
}

.cta {
  text-align: center;
  padding: 2.6rem 0 3rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: #fff;
  color: #6a7383;
  font-size: 0.9rem;
}

.footer-inner {
  padding: 1rem 0 1.6rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.footer-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.page-hero {
  padding: 2.8rem 0 1.4rem;
}

.page-hero h1 {
  margin: 0 0 0.7rem;
}

.content-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.2rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 1rem;
}

.field {
  margin-bottom: 0.8rem;
}

.field label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.field input,
.field textarea {
  width: 100%;
  border: 1px solid #cfd8e5;
  border-radius: 10px;
  padding: 0.7rem 0.75rem;
  font: inherit;
}

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

.note {
  color: #5a6779;
  font-size: 0.92rem;
}

@media (max-width: 920px) {
  .hero-grid,
  .feature-grid,
  .steps,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 2.2rem;
  }

  .header-inner {
    padding: 0.55rem 0;
    align-items: flex-start;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .menu-toggle {
    display: inline-block;
  }

  .site-nav {
    display: none;
    width: 100%;
    gap: 0.5rem;
    padding-bottom: 0.35rem;
  }

  .site-nav.menu-open {
    display: flex;
  }

  .site-nav a {
    width: 100%;
    border-radius: 10px;
  }
}