/* ===== Reset & Base ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #0056b3;
  --primary-dark: #003d80;
  --accent: #ff6b00;
  --accent-dark: #cc5500;
  --text: #1f2937;
  --text-light: #4b5563;
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --bg-dark: #0f172a;
  --border: #e2e8f0;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --radius: 8px;
  --transition: all 0.3s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
  font-weight: 600;
}

a:hover {
  color: var(--accent);
  text-decoration: underline;
}

h1, h2, h3, h4 {
  line-height: 1.3;
  color: var(--text);
  font-weight: 800;
}

h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); margin-bottom: 20px; color: var(--primary-dark); }
h3 { font-size: clamp(1.15rem, 2vw, 1.4rem); margin: 25px 0 12px; color: var(--text); }

p { margin-bottom: 18px; color: var(--text-light); }

/* ===== Header ===== */
.site-header {
  background: #fff;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 20px;
  gap: 20px;
}

.logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary-dark);
}

.logo span {
  color: var(--accent);
  font-weight: 600;
}

.main-nav {
  display: flex;
  gap: 25px;
}

.main-nav a {
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
}

.main-nav a:hover {
  color: var(--accent);
  text-decoration: none;
}

.header-cta {
  background: var(--accent);
  color: #fff !important;
  padding: 10px 20px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
  text-decoration: none !important;
}

.header-cta:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  cursor: pointer;
  color: var(--primary-dark);
}

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, #0056b3 0%, #003d80 100%);
  color: #fff;
  padding: 90px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255,107,0,0.2) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-tag {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  padding: 8px 18px;
  border-radius: 30px;
  font-size: 0.9rem;
  margin-bottom: 25px;
  border: 1px solid rgba(255,255,255,0.25);
  font-weight: 500;
}

.hero h1 {
  color: #fff;
  margin-bottom: 25px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.hero-intro {
  color: rgba(255,255,255,0.95);
  font-size: 1.15rem;
  max-width: 780px;
  margin: 0 auto 35px;
}

.hero-buttons {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  text-align: center;
  text-decoration: none !important;
}

.btn-primary {
  background: var(--accent);
  color: #fff !important;
}

.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255,107,0,0.35);
}

.btn-secondary {
  background: #fff;
  color: var(--primary-dark) !important;
}

.btn-secondary:hover {
  background: #f0f4f8;
  transform: translateY(-2px);
}

.btn-large {
  padding: 18px 40px;
  font-size: 1.1rem;
  margin-top: 30px;
}

/* ===== Article ===== */
.article-wrap {
  padding: 70px 0;
  background: var(--bg);
}

.article section {
  margin-bottom: 60px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}

.article section:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.article ul {
  list-style: none;
  margin: 20px 0;
}

.benefits-list li {
  padding: 16px 20px 16px 50px;
  background: var(--bg-soft);
  margin-bottom: 12px;
  border-radius: var(--radius);
  position: relative;
  border-left: 4px solid var(--accent);
  transition: var(--transition);
}

.benefits-list li:hover {
  transform: translateX(5px);
  box-shadow: var(--shadow);
}

.benefits-list li::before {
  content: "✓";
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-weight: bold;
  font-size: 1.3rem;
}

/* ===== FAQ ===== */
.faq-item {
  background: var(--bg-soft);
  padding: 22px 28px;
  border-radius: var(--radius);
  margin-bottom: 15px;
  border-left: 4px solid var(--primary);
  transition: var(--transition);
}

.faq-item:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.faq-item h3 {
  margin-top: 0;
  color: var(--primary-dark);
  font-size: 1.15rem;
}

.faq-item p {
  margin-bottom: 0;
}

/* ===== Contact ===== */
.contact-section {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #fff;
  padding: 80px 0;
  text-align: center;
}

.contact-section h2 {
  color: #fff;
}

.contact-sub {
  color: rgba(255,255,255,0.85);
  font-size: 1.1rem;
  margin-bottom: 40px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 25px;
  max-width: 900px;
  margin: 0 auto;
}

.contact-card {
  background: rgba(255,255,255,0.05);
  padding: 30px 20px;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.1);
  transition: var(--transition);
}

.contact-card:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-5px);
  border-color: var(--accent);
}

.contact-card h3 {
  color: var(--accent);
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 1.2rem;
}

.contact-card p {
  color: #fff;
  margin: 0;
  font-size: 1.05rem;
}

.contact-card a {
  color: #fff;
  font-weight: 600;
}

.contact-card a:hover {
  color: var(--accent);
}

/* ===== Footer ===== */
.site-footer {
  background: #0a0f1c;
  color: rgba(255,255,255,0.7);
  padding: 30px 0;
  text-align: center;
}

.site-footer p {
  color: rgba(255,255,255,0.7);
  margin-bottom: 5px;
  font-size: 0.95rem;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 20px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.08);
    gap: 15px;
  }

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

  .menu-toggle {
    display: block;
  }

  .header-cta {
    display: none;
  }

  .hero {
    padding: 70px 0;
  }

  .article-wrap {
    padding: 50px 0;
  }

  .article section {
    margin-bottom: 40px;
    padding-bottom: 30px;
  }
}

@media (max-width: 500px) {
  .hero-buttons {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .contact-section {
    padding: 60px 0;
  }
  
  .faq-item {
    padding: 18px 20px;
  }
}