:root {
  --ink: #174f36;
  --ink-soft: #4f7564;
  --green: #59b84a;
  --green-dark: #2f8c48;
  --aqua: #dff7fa;
  --aqua-deep: #a8ebe8;
  --cream: #fff8dc;
  --white: rgba(255,255,255,.94);
  --line: rgba(41, 113, 80, .16);
  --shadow: 0 18px 60px rgba(16, 96, 88, .16);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #e7fbfb;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", Arial, sans-serif;
  line-height: 1.75;
}
a { color: inherit; }
img { max-width: 100%; display: block; }
button, a { -webkit-tap-highlight-color: transparent; }

.site-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  background: linear-gradient(rgba(218,248,250,.77), rgba(218,248,250,.91)), url("pond-background.png") center/cover fixed;
}
.site-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0, rgba(255,255,255,.5), transparent 40%);
}

.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  background: rgba(239, 255, 254, .78);
  border-bottom: 1px solid var(--line);
}
.nav {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: -.02em;
  font-size: .93rem;
}
.brand-icon { height: 26px; width: 26px; object-fit: cover; border-radius: 8px; }
.brand-logo { height: 18px; width: auto; object-fit: contain; }
.nav-links { display: flex; align-items: center; gap: 18px; font-size: .93rem; font-weight: 750; }
.nav-links a { text-decoration: none; }
.hero { padding: 72px 0 48px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 56px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 16px; padding: 7px 13px; border: 1px solid rgba(47,140,72,.18); border-radius: 999px; background: rgba(255,255,255,.76); font-size: .84rem; font-weight: 850; color: var(--green-dark); }
.hero-logo { width: min(420px, 78vw); height: auto; margin: 0 0 4px; }
h1 { margin: 0; font-size: clamp(2.55rem, 7vw, 5.2rem); line-height: .98; letter-spacing: -.06em; color: var(--ink); }
.hero-copy { max-width: 600px; margin: 24px 0 0; color: var(--ink-soft); font-size: clamp(1rem, 2vw, 1.18rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 22px; border-radius: 999px; text-decoration: none; font-weight: 900; border: 1px solid transparent; transition: transform .18s ease, box-shadow .18s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--green); color: #fff; box-shadow: 0 12px 26px rgba(68,164,73,.28); }
.btn-secondary { background: rgba(255,255,255,.86); border-color: var(--line); }

.hero-art { position: relative; min-height: 520px; display: grid; place-items: center; }
.icon-card { width: min(390px, 82vw); border-radius: 34px; overflow: hidden; box-shadow: 0 28px 70px rgba(5,82,86,.23); transform: rotate(2deg); border: 8px solid rgba(255,255,255,.8); }
.float-animal { position: absolute; width: 132px; filter: drop-shadow(0 16px 25px rgba(30,90,70,.22)); }
.float-animal.frog { left: 2%; top: 62%; transform: rotate(-7deg); }
.float-animal.rabbit { right: 1%; bottom: 6%; transform: rotate(8deg); }
.float-animal.jellyfish { right: 3%; top: 1%; transform: rotate(8deg); }

.section { padding: 68px 0; }
.section-head { max-width: 690px; margin: 0 auto 34px; text-align: center; }
.kicker { margin: 0 0 8px; color: #e8a821; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; font-size: .78rem; }
h2 { margin: 0; font-size: clamp(2rem, 5vw, 3.25rem); line-height: 1.12; letter-spacing: -.045em; }
.lead { color: var(--ink-soft); margin: 14px 0 0; }

.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: var(--white); border: 1px solid rgba(255,255,255,.9); box-shadow: var(--shadow); border-radius: 28px; padding: 28px; }
.card h3 { margin: 10px 0 7px; font-size: 1.25rem; line-height: 1.3; }
.card p { margin: 0; color: var(--ink-soft); }
.step-no { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 14px; background: var(--cream); color: #d99819; font-weight: 950; }

.screens { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; align-items: start; }
.phone-shot { width: 100%; }
.phone-shot img { width: 100%; filter: drop-shadow(0 22px 40px rgba(10,70,60,.22)); }
.phone-shot:nth-child(even) { margin-top: 34px; }

.faq-wrap { display: grid; grid-template-columns: .72fr 1.28fr; gap: 28px; align-items: start; }
.faq-side { position: sticky; top: 100px; }
.faq-side .animal { width: 190px; margin: 24px auto 0; }
.faq-list { display: grid; gap: 12px; }
details { background: rgba(255,255,255,.92); border: 1px solid var(--line); border-radius: 20px; padding: 0 20px; box-shadow: 0 10px 30px rgba(20,100,80,.08); }
summary { cursor: pointer; list-style: none; padding: 19px 38px 19px 0; font-weight: 900; position: relative; }
summary::-webkit-details-marker { display:none; }
summary::after { content:"＋"; position:absolute; right:0; top:16px; font-size:1.35rem; color:var(--green); }
details[open] summary::after { content:"−"; }
details p { margin: 0; padding: 0 0 19px; color: var(--ink-soft); }

.support-panel { position: relative; overflow: hidden; background: linear-gradient(135deg, rgba(255,250,222,.96), rgba(255,255,255,.94)); border-radius: 34px; padding: 48px; box-shadow: var(--shadow); border: 1px solid rgba(255,255,255,.9); }
.support-panel::after { content:""; position:absolute; width:230px; height:230px; right:-70px; bottom:-105px; border-radius:50%; background:rgba(89,184,74,.13); }
.support-panel h2 { max-width: 650px; }
.support-panel p { max-width: 670px; color: var(--ink-soft); }
.support-meta { display:flex; flex-wrap:wrap; gap:12px; margin-top:22px; }
.pill { background: rgba(255,255,255,.72); border:1px solid var(--line); padding:8px 13px; border-radius:999px; font-weight:800; font-size:.88rem; }

.legal-links { display:grid; grid-template-columns:repeat(3,1fr); gap:14px; margin-top:26px; }
.legal-link { display:flex; justify-content:space-between; align-items:center; gap:18px; background:rgba(255,255,255,.9); border:1px solid var(--line); border-radius:18px; padding:18px; text-decoration:none; font-weight:850; }
.legal-link span:last-child { color:var(--green); font-size:1.25rem; }

.footer { padding: 34px 0 44px; border-top: 1px solid var(--line); background: rgba(226,250,248,.72); }
.footer-row { display:flex; justify-content:space-between; align-items:center; gap:20px; flex-wrap:wrap; color:var(--ink-soft); font-size:.9rem; }
.footer-links { display:flex; flex-wrap:wrap; gap:16px; }
.footer a { text-decoration:none; font-weight:750; }

.legal-page { padding: 52px 0 78px; }
.legal-shell { max-width: 900px; margin: 0 auto; background: rgba(255,255,255,.95); border-radius: 28px; padding: clamp(24px, 5vw, 58px); box-shadow: var(--shadow); border:1px solid rgba(255,255,255,.94); }
.legal-shell h1 { font-size: clamp(2.1rem, 6vw, 4rem); line-height:1.05; margin-bottom:14px; }
.legal-shell h2 { font-size:1.35rem; margin:38px 0 10px; letter-spacing:-.02em; }
.legal-shell p, .legal-shell li { color:#315c4b; }
.legal-shell ul, .legal-shell ol { padding-left: 1.35rem; }
.legal-shell .back { display:inline-flex; margin-bottom:28px; text-decoration:none; font-weight:900; color:var(--green-dark); }
.legal-table { width:100%; border-collapse:collapse; margin:24px 0 30px; }
.legal-table th, .legal-table td { border:1px solid var(--line); padding:14px; vertical-align:top; text-align:left; }
.legal-table th { width:30%; background:#effaf3; }
.note { padding:16px 18px; border-left:4px solid var(--green); background:#f4fbf5; border-radius:0 12px 12px 0; }

[data-lang="ja"] { display:none; }

@media (max-width: 860px) {
  .nav-links > a { display:none; }
  .hero { padding-top:48px; }
  .hero-grid { grid-template-columns:1fr; gap:30px; text-align:center; }
  .hero-copy { margin-left:auto; margin-right:auto; }
  .hero-actions { justify-content:center; }
  .hero-art { min-height:430px; }
  .float-animal.frog { left:3%; }
  .float-animal.rabbit { right:3%; }
  .card-grid, .legal-links { grid-template-columns:1fr; }
  .hero-logo { margin:0 auto 4px; }
  .screens { grid-template-columns:repeat(3, 1fr); }
  .phone-shot:nth-child(even) { margin-top:0; }
  .faq-wrap { grid-template-columns:1fr; }
  .faq-side { position:static; text-align:center; }
  .support-panel { padding:34px 24px; }
}

@media (max-width: 560px) {
  .container { width:min(100% - 22px, 1120px); }
  .nav { min-height:62px; }
  .brand span { display:none; }
  .hero { padding:34px 0 22px; }
  .hero-art { min-height:355px; }
  .icon-card { width:270px; border-width:6px; border-radius:27px; }
  .float-animal { width:88px; }
  .float-animal.jellyfish { width:82px; }
  .screens { grid-template-columns:repeat(2, 1fr); }
  .section { padding:48px 0; }
  .card { border-radius:23px; padding:23px; }
  .legal-shell { border-radius:22px; }
  .legal-table, .legal-table tbody, .legal-table tr, .legal-table th, .legal-table td { display:block; width:100%; }
  .legal-table th { border-bottom:0; }
}