:root {
  --qiitto: #4aab00;
  --qiitto-dark: #3d8c00;
  --ink: #1f2328;
  --muted: #6b7280;
  --bg: #f7f8fa;
  --line: #e5e7eb;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", Meiryo, sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.8;
}
.container { width: 100%; max-width: 1040px; margin: 0 auto; padding: 0 20px; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { line-height: 1.35; }

.btn {
  display: inline-block;
  background: var(--qiitto);
  color: #fff;
  font-weight: 700;
  padding: 0.8em 1.6em;
  border-radius: 8px;
  transition: background 0.15s;
}
.btn:hover { background: var(--qiitto-dark); }
.btn-sm { padding: 0.5em 1em; font-size: 0.9rem; }
.btn-light { background: #fff; color: var(--qiitto-dark); }
.btn-light:hover { background: #f0f0f0; }

/* header */
.site-header { border-bottom: 1px solid var(--line); position: sticky; top: 0; background: rgba(255,255,255,0.9); backdrop-filter: blur(6px); z-index: 10; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: flex; align-items: center; gap: 8px; }
.brand-name { font-size: 1.4rem; font-weight: 800; color: var(--qiitto-dark); }

/* hero */
.hero { background: linear-gradient(180deg, #f1f9ea 0%, #fff 100%); padding: 64px 0; }
.hero-inner { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; align-items: center; }
.eyebrow { color: var(--qiitto-dark); font-weight: 700; font-size: 0.85rem; letter-spacing: 0.04em; }
.hero h1 { font-size: 2.4rem; font-weight: 800; margin: 0.3em 0 0.5em; }
.accent { color: var(--qiitto); }
.lead { color: #374151; font-size: 1.05rem; margin-bottom: 1.6em; }
.hero-cta { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.cta-note { color: var(--muted); font-size: 0.85rem; }
.hero-shot img { width: 100%; border-radius: 12px; border: 1px solid var(--line); box-shadow: 0 10px 30px rgba(0,0,0,0.08); }

/* sections */
section h2 { font-size: 1.7rem; font-weight: 800; text-align: center; margin-bottom: 1.4em; }
.steps, .features { padding: 64px 0; }
.steps { background: var(--bg); }

.step-list { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step-list li { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 28px 24px; text-align: center; }
.step-num { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 50%; background: var(--qiitto); color: #fff; font-weight: 800; margin-bottom: 12px; }
.step-list h3 { font-size: 1.2rem; margin-bottom: 6px; }
.step-list p { color: var(--muted); font-size: 0.95rem; }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature { padding: 8px 4px; }
.feature h3 { color: var(--qiitto-dark); margin-bottom: 8px; }
.feature p { color: #374151; font-size: 0.95rem; }

.cta-band { background: var(--qiitto); color: #fff; padding: 56px 0; text-align: center; }
.cta-band h2 { color: #fff; margin-bottom: 1em; }

/* footer */
.site-footer { border-top: 1px solid var(--line); padding: 32px 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.muted { color: var(--muted); font-size: 0.9rem; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { color: var(--qiitto-dark); font-weight: 600; }

/* responsive */
@media (max-width: 760px) {
  .hero-inner, .step-list, .feature-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.9rem; }
  .hero { padding: 40px 0; }
}