*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--ocean:#0ea5e9;--coral:#f97316;--sand:#fef3c7;--deep:#0c4a6e;--font:'Noto Sans JP',sans-serif}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--sand);color:var(--deep);line-height:1.7}
img{max-width:100%;display:block;object-fit:cover}
a{color:var(--coral)}
.wave-head{display:flex;align-items:center;gap:1.5rem;padding:1rem 2rem;background:linear-gradient(135deg,var(--ocean),#38bdf8);color:#fff;flex-wrap:wrap;position:sticky;top:0;z-index:50}
.wave-head .logo{font-size:1.5rem;font-weight:700;text-decoration:none;color:#fff}
.wave-head nav{display:flex;gap:1.25rem;flex-wrap:wrap}
.wave-head nav a{text-decoration:none;color:#fff;font-size:.9rem;opacity:.95}
.menu{display:none;background:none;border:none;font-size:1.3rem;cursor:pointer;margin-left:auto;color:#fff}
.hero-wave{position:relative;min-height:70vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:4rem 2rem;overflow:hidden;background:linear-gradient(180deg,#38bdf8 0%,var(--ocean) 40%,var(--coral) 100%)}
.hero-wave::before,.hero-wave::after{content:'';position:absolute;left:0;width:200%;height:120px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 120' preserveAspectRatio='none'%3E%3Cpath fill='%23fef3c7' d='M0,60 C300,120 600,0 900,60 C1050,90 1150,30 1200,60 L1200,120 L0,120 Z'/%3E%3C/svg%3E") repeat-x bottom;background-size:50% 100%;animation:wave 12s linear infinite}
.hero-wave::after{bottom:-60px;opacity:.5;animation-direction:reverse;animation-duration:18s}
@keyframes wave{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}
.hero-inner{position:relative;z-index:2;max-width:800px;color:#fff}
.hero-inner .tag{display:inline-block;background:rgba(255,255,255,.2);padding:.35rem 1rem;border-radius:999px;font-size:.85rem;margin-bottom:1rem}
.hero-inner h1{font-size:clamp(2rem,5vw,3.2rem);margin-bottom:1rem;text-shadow:0 2px 20px rgba(0,0,0,.2)}
.hero-inner p{margin-bottom:1.5rem;opacity:.95}
.cta{display:inline-block;background:#fff;color:var(--coral);padding:.9rem 2.2rem;text-decoration:none;border-radius:999px;font-weight:700;box-shadow:0 4px 20px rgba(0,0,0,.15)}
.wave-layer-1{padding:5rem 2rem 3rem;background:var(--sand);position:relative}
.wave-layer-1::before{content:'';position:absolute;top:-1px;left:0;width:100%;height:60px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 60'%3E%3Cpath fill='%23fef3c7' d='M0,30 C200,60 400,0 600,30 C800,60 1000,0 1200,30 L1200,0 L0,0 Z'/%3E%3C/svg%3E") no-repeat top;background-size:100% 100%}
.wave-layer-1 h2{text-align:center;font-size:1.9rem;margin-bottom:.5rem;color:var(--deep)}
.lead{text-align:center;margin-bottom:2.5rem;opacity:.85}
.wave-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;max-width:1100px;margin:0 auto}
.wave-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 8px 30px rgba(14,165,233,.15);transform:translateY(0);transition:transform .3s}
.wave-card:nth-child(2){transform:translateY(20px)}
.wave-card:nth-child(5){transform:translateY(20px)}
.wave-card:hover{transform:translateY(-6px)}
.wave-card img{aspect-ratio:4/5;width:100%}
.wave-card .info{padding:1.25rem}
.wave-card h3{font-size:1rem;margin-bottom:.35rem}
.wave-card .price{font-size:1.2rem;font-weight:700;color:var(--coral)}
.wave-card button{width:100%;margin-top:.75rem;border:none;background:var(--ocean);color:#fff;padding:.65rem;cursor:pointer;border-radius:8px;font-family:inherit;font-weight:600}
.wave-card button:hover{background:var(--deep)}
.wave-layer-2{padding:4rem 2rem;background:linear-gradient(180deg,var(--sand),#fde68a);position:relative}
.wave-layer-2::after{content:'';position:absolute;bottom:0;left:0;width:100%;height:50px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 50'%3E%3Cpath fill='%23fff' d='M0,25 C300,50 600,0 900,25 C1050,38 1150,12 1200,25 L1200,50 L0,50 Z'/%3E%3C/svg%3E") no-repeat;background-size:100% 100%}
.features{padding:4rem 2rem;background:#fff;max-width:1000px;margin:0 auto}
.features h2{text-align:center;margin-bottom:2rem;font-size:1.8rem}
.feat-waves{display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem}
.feat-waves div{padding:1.5rem;background:linear-gradient(135deg,#e0f2fe,#fef3c7);border-radius:12px;border-left:5px solid var(--coral)}
.feat-waves strong{display:block;font-size:1.8rem;color:var(--ocean);opacity:.6;margin-bottom:.25rem}
.feat-waves h3{margin-bottom:.5rem}
.feat-banner{margin-top:2rem;border-radius:16px;overflow:hidden;max-height:280px}
.reviews{padding:4rem 2rem;background:linear-gradient(180deg,#fff,var(--sand))}
.reviews h2{text-align:center;margin-bottom:2rem}
.review-stack{max-width:750px;margin:0 auto;display:flex;flex-direction:column;gap:1.25rem}
.review-stack blockquote{background:#fff;padding:1.5rem;border-radius:12px;box-shadow:0 4px 15px rgba(0,0,0,.06);border-top:4px solid var(--ocean)}
.review-stack cite{display:block;margin-top:.75rem;font-size:.85rem;color:var(--coral)}
.faq{padding:3rem 2rem;max-width:720px;margin:0 auto}
.faq h2{margin-bottom:1.5rem;text-align:center}
.faq details{margin-bottom:1rem;background:#fff;border-radius:10px;padding:1rem 1.25rem;border:1px solid #fde68a}
.faq summary{cursor:pointer;font-weight:600;color:var(--deep)}
.legal{padding:3rem 2rem;background:var(--deep);color:#e0f2fe;font-size:.88rem}
.legal dl{display:grid;grid-template-columns:auto 1fr;gap:.35rem .75rem;margin:1rem 0}
.legal h3,.legal h4{color:var(--coral);margin:1.25rem 0 .5rem}
.legal a{color:#7dd3fc}
.copy{margin-top:2rem;opacity:.6;text-align:center}
.toast{position:fixed;bottom:1.5rem;right:1.5rem;background:var(--deep);color:#fff;padding:1rem 1.5rem;border-radius:12px;transform:translateY(150%);transition:transform .3s;z-index:99}
.toast.show{transform:translateY(0)}
@media(max-width:900px){.wave-grid{grid-template-columns:repeat(2,1fr)}.wave-card:nth-child(2),.wave-card:nth-child(5){transform:none}}
@media(max-width:768px){
  .menu{display:block}
  .wave-head nav{display:none;width:100%;flex-direction:column}
  .wave-head nav.open{display:flex}
  .wave-grid,.feat-waves{grid-template-columns:1fr}
}