:root {
  --bg: #f1f5f9;
  --bg-alt: #ffffff;
  --accent: #0ea5e9;
  --accent-strong: #0369a1;
  --accent-soft: rgba(14,165,233,0.08);
  --accent-green: #22c55e;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --shadow-soft: 0 18px 40px rgba(15,23,42,0.08);
  --max-width: 1120px;
}

*,
*::before,
*::after { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #f9fafb 0, #e2e8f0 32%, #f1f5f9 100%);
  color: var(--text-main);
  line-height: 1.7;
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 18px 52px;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(248,250,252,0.96);
  border-bottom: 1px solid rgba(226,232,240,0.96);
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 10px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.nav-left { display: flex; align-items: center; gap: 10px; }

.logo-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.logo-mark {
  width: 32px; height: 32px;
  border-radius: 999px;
  background: radial-gradient(circle at 20% 20%, var(--accent), #e0f2fe);
  display: flex; align-items: center; justify-content: center;
  color: #f9fafb; font-weight: 700; font-size: 0.9rem;
  box-shadow: 0 10px 26px rgba(59,130,246,0.45);
}

.logo-text { display: flex; flex-direction: column; }

.logo-text-main { font-size: 1rem; font-weight: 600; }
.logo-text-sub { font-size: 0.8rem; color: var(--text-muted); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.nav-links a {
  padding: 6px 10px;
  border-radius: 999px;
}

.nav-links a:hover {
  background: #e0f2fe;
  color: var(--accent-strong);
}

@media (max-width: 780px) {
  .nav { flex-wrap: wrap; justify-content: center; }
  .nav-links { display: none; }
}

/* Buttons & badges */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--accent-strong);
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #f9fafb;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 16px 34px rgba(37,99,235,0.4);
}

.btn:hover { filter: brightness(1.03); }

.btn-secondary {
  background: #ffffff;
  border-color: var(--border);
  color: var(--text-main);
  box-shadow: 0 10px 22px rgba(148,163,184,0.35);
}

.btn-small { font-size: 0.8rem; padding: 7px 13px; }

.btn-outline {
  background: transparent;
  color: var(--accent-strong);
  border-color: rgba(14,165,233,0.7);
  box-shadow: none;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  border: 1px solid rgba(148,163,184,0.4);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.badge-neutral {
  background: #e2e8f0;
  border-color: #e2e8f0;
  color: #475569;
}

/* Hero */
.hero { padding: 24px 18px 20px; }

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 3.2fr) minmax(0, 2.3fr);
  gap: 32px;
  align-items: center;
}

@media (max-width: 880px) {
  .hero-inner { grid-template-columns: minmax(0,1fr); }
}

.hero-pre { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 4px; }

.hero-title {
  font-size: clamp(1.9rem, 3.1vw, 2.5rem);
  line-height: 1.1;
  margin: 6px 0 10px;
}

.hero-title span { color: var(--accent-strong); }

.hero-subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 540px;
}

.hero-actions {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-meta {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-meta span::before {
  content: "●";
  font-size: 0.6rem;
  color: var(--accent-green);
}

.hero-card {
  border-radius: 22px;
  background: #ffffff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  padding: 16px 16px 18px;
}

.hero-card h2 { font-size: 0.98rem; margin: 0 0 6px; }

.hero-card p {
  font-size: 0.86rem;
  color: var(--text-muted);
  margin: 4px 0;
}

.highlight-box {
  margin-top: 10px;
  border-radius: 16px;
  border: 1px solid rgba(34,197,94,0.35);
  background: linear-gradient(135deg, #dcfce7, #ffffff);
  padding: 9px 11px 10px;
}

.highlight-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.highlight-name { font-weight: 600; font-size: 0.94rem; }
.highlight-rating { font-size: 0.82rem; color: #166534; }

.highlight-body {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* Sections */
.section { margin: 30px 0; }

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.section-title { font-size: 1.08rem; font-weight: 600; }
.section-subtitle { font-size: 0.86rem; color: var(--text-muted); }

/* Grid & cards */
.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 14px;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0,1fr));
}

@media (max-width: 960px) {
  .grid-3 { grid-template-columns: repeat(2, minmax(0,1fr)); }
}

@media (max-width: 880px) {
  .grid,
  .grid-3 { grid-template-columns: minmax(0,1fr); }
}

.card {
  border-radius: 16px;
  background: #ffffff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  padding: 12px 12px 13px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
}

.card-title { font-size: 0.95rem; font-weight: 600; margin: 0 0 2px; }
.card-meta { font-size: 0.8rem; color: var(--text-muted); }

.card-body {
  margin-top: 6px;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid rgba(148,163,184,0.6);
  font-size: 0.74rem;
  color: var(--accent-strong);
}

.chip-green {
  background: rgba(34,197,94,0.08);
  border-color: rgba(34,197,94,0.4);
  color: #15803d;
}

/* FAQ & notice */
.faq-list {
  border-radius: 16px;
  background: #ffffff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  padding: 12px 12px 10px;
}

.faq-item + .faq-item {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid #e2e8f0;
}

.faq-question { font-size: 0.9rem; font-weight: 500; }
.faq-answer { font-size: 0.86rem; color: var(--text-muted); margin-top: 4px; }

.notice {
  font-size: 0.8rem;
  color: var(--text-muted);
  border-radius: 12px;
  padding: 8px 10px;
  background: #f8fafc;
  border: 1px dashed #cbd5f5;
  margin-top: 6px;
}

/* CTA bar */
.cta-bar {
  margin: 20px 0;
  border-radius: 999px;
  padding: 9px 12px;
  background: linear-gradient(90deg, #e0f2fe, #dcfce7);
  border: 1px solid rgba(148,163,184,0.4);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 0.86rem;
}

.cta-bar strong { color: #0f172a; }

@media (max-width: 640px) {
  .cta-bar {
    border-radius: 16px;
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Article layout */
.article {
  max-width: 760px;
  margin: 0 auto;
}

.article p {
  font-size: 0.93rem;
  color: var(--text-main);
  margin: 0 0 10px;
}

.article h2 {
  font-size: 1.02rem;
  margin: 18px 0 8px;
}

.article ul {
  margin: 0 0 10px 18px;
  padding: 0;
  font-size: 0.93rem;
  color: var(--text-main);
}

.article li { margin-bottom: 4px; }

.article-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

/* Footer */
.footer {
  border-top: 1px solid #e2e8f0;
  padding-top: 12px;
  margin-top: 24px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

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

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-links a { color: var(--text-muted); }
.footer-links a:hover { color: var(--accent-strong); }