:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --line: #e2e8f0;
  --primary: #5b5cf0;
  --primary-dark: #4b4de0;
  --accent: #10b981;
  --accent-dark: #059669;
  --soft-primary: #eef2ff;
  --soft-accent: #ecfdf5;
  --warning-bg: #fffbeb;
  --warning-line: #fde68a;
  --warning-text: #92400e;
  --shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
  --radius: 24px;
  --max: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; padding: 16px 0;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
  width: 44px; height: 44px; border-radius: 16px; background: #fff;
  border: 1px solid var(--line); box-shadow: 0 4px 12px rgba(15,23,42,.05); overflow: hidden;
}
.brand-text strong { font-size: 1.1rem; letter-spacing: -0.02em; }
.brand-text small { display:block; color: var(--muted); font-size: .8rem; }
.brand-text .ai { color: var(--accent); }
.nav { display: flex; align-items: center; gap: 28px; color: var(--muted); font-size: .95rem; }
.nav a:hover { color: var(--text); }
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 22px; border-radius: 18px; border: 1px solid transparent;
  font-weight: 700; transition: .2s ease; cursor: pointer;
}
.button:hover { transform: translateY(-1px); }
.button.primary { background: var(--primary); color: #fff; box-shadow: 0 14px 26px rgba(91,92,240,.18); }
.button.primary:hover { background: var(--primary-dark); }
.button.secondary { background: #fff; color: var(--text); border-color: var(--line); }
.button.secondary:hover { border-color: #cbd5e1; }
.button.accent { background: var(--accent); color: #fff; }
.button.accent:hover { background: var(--accent-dark); }
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(circle at top left, rgba(91,92,240,.14), transparent 34%),
    radial-gradient(circle at bottom right, rgba(16,185,129,.12), transparent 32%);
}
.hero-grid { display: grid; grid-template-columns: 1.12fr .88fr; gap: 52px; align-items: center; padding: 84px 0 72px; }
.pill {
  display: inline-flex; align-items: center; gap: 10px; padding: 10px 16px;
  border-radius: 999px; background: #fff; border: 1px solid var(--line); box-shadow: 0 8px 18px rgba(15,23,42,.05);
  color: #334155; font-size: .92rem; font-weight: 600;
}
.pill-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); }
.hero h1 { margin: 18px 0 0; font-size: clamp(2.7rem, 5vw, 4.5rem); line-height: 1.03; letter-spacing: -0.05em; }
.hero h1 .primary { color: var(--primary); }
.hero h1 .accent { color: var(--accent); }
.hero p.lead { margin: 18px 0 0; max-width: 700px; font-size: 1.16rem; color: var(--muted); }
.hero-actions { display:flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.notice {
  margin-top: 20px; padding: 14px 16px; border-radius: 16px;
  background: var(--warning-bg); border: 1px solid var(--warning-line); color: var(--warning-text); font-size: .95rem;
}
.hero-meta { display:flex; flex-wrap: wrap; gap: 24px; margin-top: 24px; color: #64748b; font-size: .95rem; }
.hero-visual {
  position: relative; padding: 14px; border-radius: 34px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow);
}
.hero-visual:before {
  content:""; position:absolute; inset:-14px; z-index:-1; border-radius:40px;
  background: linear-gradient(135deg, rgba(91,92,240,.12), rgba(255,255,255,.7), rgba(16,185,129,.12));
  filter: blur(18px);
}
.hero-visual img { border-radius: 26px; }
.section { padding: 84px 0; }
.section-tight { padding: 72px 0; }
.section-head { max-width: 720px; margin-bottom: 36px; }
.kicker {
  color: var(--primary); text-transform: uppercase; letter-spacing: .2em; font-size: .82rem; font-weight: 800;
}
.section h2 { margin: 10px 0 0; font-size: clamp(2rem, 4vw, 3rem); line-height: 1.1; letter-spacing: -0.04em; }
.section p.sub { margin-top: 14px; color: var(--muted); font-size: 1.05rem; }
.grid-3 { display:grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display:grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 28px; box-shadow: 0 10px 24px rgba(15,23,42,.04);
}
.tool-card { padding: 24px; transition: .2s ease; }
.tool-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.tool-top { display:flex; justify-content: space-between; align-items: flex-start; gap: 16px; }
.tag { display:inline-flex; padding: 8px 12px; border-radius:999px; background:#f1f5f9; color:#334155; font-size:.8rem; font-weight:700; }
.tool-logo {
  width: 46px; height: 46px; border-radius: 14px; border: 1px solid var(--line); background: #fff; object-fit: contain; padding: 6px;
}
.tool-card h3 { margin: 16px 0 8px; font-size: 1.28rem; letter-spacing: -0.03em; }
.tool-card p { margin: 0; color: var(--muted); }
.inline-cta { margin-top: 18px; display:inline-flex; padding:10px 14px; border-radius: 16px; background: var(--soft-primary); color: var(--primary-dark); font-weight: 700; }
.categories { background:#fff; border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.category-card { padding: 24px; background: #f8fafc; }
.category-card .icon { font-size: 2rem; }
.category-card h3 { margin: 16px 0 8px; }
.split { display:grid; grid-template-columns: .9fr 1.1fr; gap: 28px; }
.dark-card {
  background:#0f172a; color:#fff; padding: 34px; border-radius: 34px; box-shadow: var(--shadow);
}
.dark-card p, .dark-card li { color: #cbd5e1; }
.checklist { padding-left: 18px; margin-top: 20px; }
.newsletter { padding: 34px; }
.newsletter-top { display:flex; gap: 20px; align-items: flex-start; }
.newsletter-top img { width: 124px; border-radius: 24px; border: 1px solid var(--line); box-shadow: 0 8px 18px rgba(15,23,42,.08); }
.newsletter-form { display:grid; grid-template-columns: 1fr 1fr auto; gap: 14px; margin-top: 24px; }
.input {
  width:100%; padding: 14px 16px; border-radius: 18px; border:1px solid #cbd5e1; background:#fff; font: inherit;
}
.input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(91,92,240,.09); }
.small { color:#64748b; font-size: .87rem; }
.guides-head { display:flex; justify-content: space-between; align-items: flex-end; gap: 20px; margin-bottom: 36px; }
.post-card { overflow:hidden; }
.post-card img { width:100%; height: 220px; object-fit: cover; }
.post-body { padding: 22px; }
.post-body h3 { margin: 14px 0 8px; font-size: 1.3rem; line-height: 1.2; }
.post-body p { margin: 0; color: var(--muted); }
.footer { border-top: 1px solid var(--line); background:#fff; }
.footer-inner { display:flex; justify-content: space-between; gap: 28px; padding: 34px 0; color: #64748b; }
.footer-links { display:flex; flex-wrap: wrap; gap: 20px; }
.page-hero { padding: 72px 0 30px; }
.page-hero h1 { font-size: clamp(2.4rem, 4vw, 4rem); line-height:1.05; letter-spacing:-.04em; margin: 0; }
.breadcrumbs { color:#64748b; font-size:.95rem; margin-bottom: 14px; }
.content-wrap { display:grid; grid-template-columns: minmax(0, 760px) 320px; gap: 28px; padding-bottom: 80px; }
.article-card, .sidebar-card { padding: 28px; }
.article-card h2 { font-size: 1.8rem; margin-top: 34px; }
.article-card h3 { font-size: 1.25rem; margin-top: 24px; }
.article-card p, .article-card li { color: #334155; }
.article-card ul { padding-left: 20px; }
.cta-box {
  margin: 28px 0; padding: 20px; border-radius: 22px; background: var(--soft-primary); border: 1px solid rgba(91,92,240,.16);
}
.sidebar-card + .sidebar-card { margin-top: 18px; }
.sidebar-card h3 { margin-top: 0; }
.sidebar-list { margin: 0; padding-left: 20px; color: var(--muted); }
.top-review {
  display:flex; gap:18px; align-items:center; padding: 18px; border-radius: 20px; background:#fff; border:1px solid var(--line);
}
.top-review img { width: 54px; height: 54px; object-fit: contain; border-radius: 16px; border:1px solid var(--line); background:#fff; padding:8px; }
.mobile-toggle { display:none; }
.notice-inline { font-size: .93rem; color: var(--muted); }
@media (max-width: 1024px) {
  .hero-grid, .split, .content-wrap, .grid-4, .grid-3 { grid-template-columns: 1fr; }
  .newsletter-form { grid-template-columns: 1fr; }
  .content-wrap { padding-bottom: 60px; }
}
@media (max-width: 820px) {
  .nav { display:none; }
  .mobile-toggle { display:inline-flex; }
  .hero { overflow: visible; }
  .section, .section-tight { padding: 62px 0; }
  .hero-grid { padding: 56px 0 50px; gap: 32px; }
  .footer-inner, .guides-head, .header-inner { flex-direction: column; align-items: flex-start; }
  .newsletter-top { flex-direction: column; }
}