:root{--ink:#10213d;--muted:#60708a;--blue:#0f5bd3;--blue-deep:#103e8f;--pale:#f3f7fd;--line:#d9e3f2;--white:#fff;--red:#c53131}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--white);font-family:"Yu Gothic UI","Noto Sans JP",system-ui,sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit}.wrap{width:min(1120px,calc(100% - 40px));margin-inline:auto}
.site-header{border-bottom:1px solid rgba(217,227,242,.8);background:rgba(255,255,255,.94)}
.nav{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:11px;font-weight:800;text-decoration:none}.brand img{border-radius:10px}.nav nav{display:flex;gap:28px}.nav nav a,.footer-inner a{color:var(--muted);font-size:.9rem;text-decoration:none}.nav nav a:hover,.footer-inner a:hover,.text-link:hover{color:var(--blue)}
.hero{padding:90px 0 100px;background:radial-gradient(circle at 12% 18%,#e6f0ff 0,transparent 28rem),linear-gradient(145deg,#fbfdff,#f2f6fc)}
.hero-grid{display:grid;grid-template-columns:.9fr 1.1fr;align-items:center;gap:60px}.eyebrow{margin:0 0 16px;color:var(--blue);font-size:.76rem;font-weight:800;letter-spacing:.18em}.hero h1{margin:0;font-size:clamp(2.5rem,5.4vw,4.7rem);line-height:1.15;letter-spacing:-.055em}.hero h1 span{color:var(--blue)}.lead{max-width:590px;margin:26px 0 0;color:var(--muted);font-size:1.12rem;line-height:1.9}.actions{display:flex;align-items:center;gap:22px;margin-top:32px}.button{display:inline-flex;align-items:center;justify-content:center;padding:13px 20px;border-radius:999px;color:#fff;background:var(--blue);font-weight:750;text-decoration:none}.button.disabled{cursor:default;opacity:.62}.text-link{color:var(--blue);font-weight:750;text-decoration:none}.support-note{margin:18px 0 0;color:var(--blue-deep);font-weight:800;line-height:1.7}.support-note a{color:var(--blue);text-decoration-thickness:1px;text-underline-offset:3px}.support-note a:hover{color:var(--blue-deep)}.note{margin:8px 0 0;color:var(--muted);font-size:.86rem}.preview{margin:0;padding:12px;border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:0 24px 70px rgba(27,68,126,.18);transform:rotate(1deg)}.preview img{display:block;width:100%;height:auto;border-radius:12px}
.section{padding:94px 0}.section h2{margin:0;font-size:clamp(2rem,4vw,3.2rem);letter-spacing:-.04em}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:46px}.feature-grid article{padding:30px;border:1px solid var(--line);border-radius:20px;background:#fff}.feature-grid article>span{color:var(--blue);font-size:.78rem;font-weight:800;letter-spacing:.12em}.feature-grid h3{margin:20px 0 10px;font-size:1.24rem}.feature-grid p,.caution-box>p{margin:0;color:var(--muted);line-height:1.85}
.how{background:var(--pale)}.split{display:grid;grid-template-columns:.8fr 1.2fr;gap:80px}.split ol{margin:0;padding:0;list-style:none;counter-reset:steps}.split li{display:grid;grid-template-columns:42px 150px 1fr;align-items:baseline;gap:15px;padding:22px 0;border-bottom:1px solid var(--line);counter-increment:steps}.split li:before{content:"0" counter(steps);color:var(--blue);font-size:.8rem;font-weight:800}.split li span{color:var(--muted);line-height:1.75}.caution{padding:70px 0}.caution-box{display:grid;grid-template-columns:.7fr 1.3fr;gap:60px;padding:36px;border:1px solid #f0d4d4;border-radius:22px;background:#fffafa}.caution-box .eyebrow{color:var(--red)}
footer{border-top:1px solid var(--line)}.footer-inner{min-height:100px;display:flex;align-items:center;justify-content:space-between;gap:30px;color:var(--muted);font-size:.88rem}.footer-inner div{display:flex;gap:22px}
.policy-page{background:linear-gradient(180deg,#f7faff 0,#fff 28rem)}.policy{max-width:820px;padding:76px 0 100px}.policy h1{margin:0;font-size:clamp(2.35rem,6vw,4rem);letter-spacing:-.045em}.updated{margin:14px 0 44px;color:var(--muted);font-size:.9rem}.policy>p:not(.eyebrow):not(.updated){color:#485a74;line-height:1.95}.policy h2{margin:44px 0 12px;padding-top:28px;border-top:1px solid var(--line);font-size:1.28rem}.policy-links{display:flex;align-items:center;gap:24px;margin-top:54px}
@media(max-width:820px){.hero{padding:62px 0 72px}.hero-grid,.split,.caution-box{grid-template-columns:1fr;gap:42px}.preview{transform:none}.feature-grid{grid-template-columns:1fr}.section{padding:70px 0}.split li{grid-template-columns:34px 120px 1fr}}
@media(max-width:560px){.wrap{width:min(100% - 28px,1120px)}.nav{min-height:66px}.nav nav a:first-child{display:none}.hero h1{font-size:2.55rem}.actions,.policy-links{align-items:flex-start;flex-direction:column}.split li{grid-template-columns:30px 1fr}.split li span{grid-column:2}.footer-inner{align-items:flex-start;flex-direction:column;padding:28px 0}.footer-inner div{flex-wrap:wrap}.policy{padding-top:54px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}