:root {
  --primary: #4A90D9;
  --primary-dark: #357abd;
  --bg: #f7f9fc;
  --card: #fff;
  --text: #1a1a1a;
  --muted: #666;
  --border: #e8edf2;
  --radius: 14px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Hiragino Sans', 'Yu Gothic', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

/* ── Header ── */
header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.logo-name {
  font-size: 17px;
  font-weight: 700;
}

nav {
  display: flex;
  gap: 24px;
}

nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  transition: color .2s;
}

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

/* ── Container ── */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Hero ── */
.hero {
  background: linear-gradient(135deg, #e8f2fb 0%, #f0f7ff 100%);
  padding: 80px 0 60px;
  text-align: center;
}

.hero-icon {
  width: 96px;
  height: 96px;
  background: var(--primary);
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  margin: 0 auto 24px;
  box-shadow: 0 8px 24px rgba(74,144,217,.35);
}

.hero h1 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text);
}

.hero p {
  font-size: 18px;
  color: var(--muted);
  margin-bottom: 32px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 15px;
  padding: 14px 32px;
  border-radius: 30px;
  box-shadow: 0 4px 16px rgba(74,144,217,.4);
  transition: background .2s, transform .1s;
}

.btn:hover { background: var(--primary-dark); transform: translateY(-1px); }

/* ── Features ── */
.section {
  padding: 64px 0;
}

.section-title {
  font-size: 24px;
  font-weight: 800;
  text-align: center;
  margin-bottom: 8px;
}

.section-sub {
  text-align: center;
  color: var(--muted);
  margin-bottom: 40px;
  font-size: 15px;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
  border: 1px solid var(--border);
}

.feature-icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
}

/* ── Premium ── */
.premium-section {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  color: #fff;
  padding: 64px 0;
  text-align: center;
}

.premium-section .section-title { color: #fff; }
.premium-section .section-sub { color: rgba(255,255,255,.7); }

.premium-badge {
  display: inline-block;
  background: #FFB800;
  color: #1a1a1a;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.premium-features {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  margin-top: 32px;
}

.premium-feature {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  color: rgba(255,255,255,.9);
}

/* ── Page content ── */
.page-hero {
  background: linear-gradient(135deg, #e8f2fb 0%, #f0f7ff 100%);
  padding: 48px 0 40px;
  text-align: center;
}

.page-hero h1 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 8px;
}

.page-hero p {
  color: var(--muted);
  font-size: 15px;
}

.content {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.content h2 {
  font-size: 20px;
  font-weight: 700;
  margin: 40px 0 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary);
  color: var(--primary);
}

.content h2:first-child { margin-top: 0; }

.content h3 {
  font-size: 16px;
  font-weight: 700;
  margin: 24px 0 8px;
  color: var(--text);
}

.content p {
  font-size: 15px;
  color: #333;
  margin-bottom: 12px;
}

.content ul, .content ol {
  margin: 8px 0 16px 20px;
}

.content li {
  font-size: 15px;
  color: #333;
  margin-bottom: 6px;
}

/* ── FAQ ── */
.faq-item {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 12px;
  border: 1px solid var(--border);
  box-shadow: 0 1px 6px rgba(0,0,0,.04);
}

.faq-q {
  font-size: 15px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.faq-a {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
}

/* ── Table ── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 16px 0;
}

.data-table th {
  background: var(--primary);
  color: #fff;
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
}

.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.data-table tr:nth-child(even) td { background: #f7f9fc; }

.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 6px;
}

.badge-yes { background: #ffeaea; color: #d00; }
.badge-no  { background: #eaf4ea; color: #080; }

/* ── Footer ── */
footer {
  background: #1a1a1a;
  color: rgba(255,255,255,.5);
  text-align: center;
  padding: 32px 24px;
  font-size: 13px;
}

footer a { color: rgba(255,255,255,.7); text-decoration: none; }
footer a:hover { color: #fff; }

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 16px;
}

/* ── Responsive ── */
@media (max-width: 600px) {
  .hero h1 { font-size: 26px; }
  .hero p { font-size: 15px; }
  nav { gap: 16px; }
  .premium-features { flex-direction: column; align-items: center; gap: 16px; }
}