/* styles.css */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root{
  --bg: #fbfcfe;
  --surface: #ffffff;
  --surface-2: #f4f7ff;
  --text: #142234;
  --muted: rgba(20, 34, 52, 0.72);
  --soft: rgba(20, 34, 52, 0.10);
  --soft-2: rgba(20, 34, 52, 0.06);
  --brand: #2b6cb0;
  --brand-2: #6b5bd2;
  --focus: #0b5cff;
  --radius: 18px;
  --shadow: 0 18px 50px rgba(20, 34, 52, 0.10);
  --shadow-soft: 0 10px 30px rgba(20, 34, 52, 0.08);
  --max: 1040px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background: radial-gradient(1200px 600px at 10% -10%, rgba(43,108,176,0.12), transparent 60%),
              radial-gradient(900px 500px at 95% 0%, rgba(107,91,210,0.10), transparent 55%),
              var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.6;
}

img{ max-width: 100%; height: auto; display: block; }
a{ color: inherit; }

.container{
  width: min(var(--max), 92vw);
  margin-inline: auto;
}

.skip-link{
  position: absolute;
  left: 12px;
  top: 12px;
  padding: 10px 12px;
  background: var(--surface);
  border: 1px solid var(--soft);
  border-radius: 12px;
  box-shadow: var(--shadow-soft);
  transform: translateY(-140%);
  transition: transform 160ms ease;
  z-index: 999;
}
.skip-link:focus{
  transform: translateY(0);
  outline: 3px solid rgba(11,92,255,0.25);
  outline-offset: 3px;
}

/* Header */
.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(251,252,254,0.78);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--soft-2);
}
.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 0;
}

.brand{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.brand-mark{
  width: 34px;
  height: 34px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(43,108,176,0.16), rgba(107,91,210,0.14));
  border: 1px solid rgba(20,34,52,0.08);
  color: rgba(20,34,52,0.80);
}
.brand-name{
  font-size: 0.98rem;
}

.header-nav{
  display: flex;
  gap: 10px;
  align-items: center;
}
.header-nav a{
  text-decoration: none;
  color: rgba(20,34,52,0.82);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid transparent;
  transition: background 140ms ease, border-color 140ms ease;
}
.header-nav a:hover{
  background: rgba(255,255,255,0.75);
  border-color: rgba(20,34,52,0.10);
}

.header-nav a:focus-visible,
a:focus-visible,
summary:focus-visible{
  outline: 3px solid rgba(11,92,255,0.25);
  outline-offset: 3px;
  border-radius: 12px;
}

/* Hero */
.hero{
  position: relative;
  padding: 34px 0 0;
}
.hero-grid{
  display: grid;
  gap: 22px;
  align-items: start;
  padding: 18px 0 10px;
}

.kicker{
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.95rem;
}
.hero h1{
  margin: 0 0 12px;
  font-size: clamp(1.7rem, 1.2rem + 2.4vw, 2.65rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}
.hero-subline{
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 62ch;
}

.benefits{
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
  display: grid;
  gap: 10px;
}
.benefits li{
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 10px;
  align-items: start;
  padding: 12px 12px;
  border-radius: 16px;
  background: rgba(255,255,255,0.72);
  border: 1px solid rgba(20,34,52,0.08);
  box-shadow: 0 10px 24px rgba(20,34,52,0.06);
}
.benefit-icon{
  color: rgba(43,108,176,0.85);
  margin-top: 1px;
}

.hero-note{
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 14px;
  background: linear-gradient(135deg, rgba(43,108,176,0.10), rgba(107,91,210,0.08));
  border: 1px solid rgba(20,34,52,0.08);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  max-width: 66ch;
}
.hero-note p{
  margin: 0;
  color: rgba(20,34,52,0.80);
}
.dot{
  width: 10px;
  height: 10px;
  border-radius: 999px;
  margin-top: 6px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
}

/* Visual */
.hero-visual{
  margin-top: 6px;
}
.card-visual{
  position: relative;
  border-radius: 26px;
  overflow: hidden;
  background: rgba(255,255,255,0.70);
  border: 1px solid rgba(20,34,52,0.08);
  box-shadow: var(--shadow);
}
.visual-bg{
  width: 100%;
  height: auto;
  display: block;
}
.visual-badge{
  position: absolute;
  left: 14px;
  bottom: 14px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.86);
  border: 1px solid rgba(20,34,52,0.10);
  box-shadow: 0 14px 28px rgba(20,34,52,0.10);
}
.badge-icon{
  width: 30px;
  height: 30px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(43,108,176,0.16), rgba(107,91,210,0.14));
  color: rgba(20,34,52,0.85);
}
.badge-text{
  font-weight: 700;
  font-size: 0.92rem;
  color: rgba(20,34,52,0.86);
}

/* Divider */
.divider{
  margin-top: 26px;
  line-height: 0;
}
.divider svg{
  width: 100%;
  height: 70px;
  display: block;
}

/* Sections */
.section{
  padding: 44px 0;
}
.section-alt{
  background: linear-gradient(180deg, rgba(244,247,255,0.85), rgba(244,247,255,0.45));
  border-top: 1px solid rgba(20,34,52,0.06);
  border-bottom: 1px solid rgba(20,34,52,0.06);
}
.section-head{
  margin-bottom: 18px;
}
.section h2{
  margin: 0 0 10px;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}
.section-lead{
  margin: 0;
  color: var(--muted);
  max-width: 72ch;
}

/* Cards */
.cards{
  margin-top: 18px;
  display: grid;
  gap: 14px;
}
.card{
  background: rgba(255,255,255,0.86);
  border: 1px solid rgba(20,34,52,0.08);
  border-radius: var(--radius);
  padding: 16px 16px;
  box-shadow: 0 12px 26px rgba(20,34,52,0.06);
}
.card h3{
  margin: 0 0 8px;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}
.card p{
  margin: 0;
  color: rgba(20,34,52,0.78);
}

/* Steps */
.steps{
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}
.step{
  background: rgba(255,255,255,0.86);
  border: 1px solid rgba(20,34,52,0.08);
  border-radius: var(--radius);
  padding: 16px 16px;
  box-shadow: 0 12px 26px rgba(20,34,52,0.06);
}
.step-top{
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}
.step-num{
  width: 30px;
  height: 30px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-weight: 800;
  background: linear-gradient(135deg, rgba(43,108,176,0.16), rgba(107,91,210,0.14));
  border: 1px solid rgba(20,34,52,0.10);
  color: rgba(20,34,52,0.86);
}
.step h3{
  margin: 0;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}
.step p{
  margin: 0;
  color: rgba(20,34,52,0.78);
}

/* Partner */
.partner .partner-box{
  margin-top: 16px;
  background: rgba(255,255,255,0.86);
  border: 1px solid rgba(20,34,52,0.08);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow-soft);
}
.partner-hint{
  margin: 0 0 12px;
  display: flex;
  gap: 10px;
  align-items: center;
  color: rgba(20,34,52,0.78);
}
.pill{
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(20,34,52,0.06);
  border: 1px solid rgba(20,34,52,0.10);
  font-weight: 700;
  font-size: 0.86rem;
  color: rgba(20,34,52,0.82);
}
.partner-logo{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(244,247,255,0.70);
  border: 1px solid rgba(20,34,52,0.10);
  text-decoration: none;
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease;
}
.partner-logo:hover{
  transform: translateY(-1px);
  box-shadow: 0 16px 30px rgba(20,34,52,0.10);
  background: rgba(244,247,255,0.90);
}
.partner-logo img{
  width: min(260px, 72vw);
  height: auto;
}

/* FAQ */
.faq{
  margin-top: 16px;
  display: grid;
  gap: 10px;
}
.faq-item{
  background: rgba(255,255,255,0.86);
  border: 1px solid rgba(20,34,52,0.08);
  border-radius: var(--radius);
  padding: 0;
  box-shadow: 0 12px 26px rgba(20,34,52,0.06);
  overflow: hidden;
}
.faq-item summary{
  cursor: pointer;
  padding: 14px 16px;
  font-weight: 700;
  color: rgba(20,34,52,0.88);
  list-style: none;
}
.faq-item summary::-webkit-details-marker{
  display: none;
}
.faq-item summary{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}
.faq-item summary::after{
  content: "＋";
  font-weight: 900;
  color: rgba(20,34,52,0.60);
}
.faq-item[open] summary::after{
  content: "–";
}
.faq-content{
  padding: 0 16px 16px;
}
.faq-content p{
  margin: 0;
  color: rgba(20,34,52,0.78);
}

/* Footer */
.site-footer{
  padding: 26px 0 34px;
  border-top: 1px solid rgba(20,34,52,0.08);
  background: rgba(255,255,255,0.55);
}
.footer-inner{
  display: grid;
  gap: 14px;
}
.footer-name{
  margin: 0 0 6px;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.footer-disclaimer{
  margin: 0;
  color: rgba(20,34,52,0.70);
  max-width: 80ch;
}
.footer-right{
  display: grid;
  gap: 6px;
}
.legal{
  margin: 0;
  color: rgba(20,34,52,0.64);
  font-size: 0.95rem;
}

/* Responsive */
@media (min-width: 860px){
  .hero{
    padding-top: 44px;
  }
  .hero-grid{
    grid-template-columns: 1.05fr 0.95fr;
    gap: 28px;
    align-items: center;
  }
  .cards{
    grid-template-columns: repeat(3, 1fr);
  }
  .steps{
    grid-template-columns: repeat(3, 1fr);
  }
  .footer-inner{
    grid-template-columns: 1.4fr 0.6fr;
    align-items: start;
  }
}