*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:72px}body{font-family:Inter,Noto Sans JP,sans-serif;color:#3a4a5c;background:#0b0f1a;line-height:2;font-size:1rem;-webkit-font-smoothing:antialiased}body.no-scroll{overflow:hidden}.container{max-width:1000px;margin:0 auto;padding:0 2.5rem}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:absolute;top:-100%;left:1rem;z-index:10000;padding:.75rem 1.5rem;background:#06b6d4;color:#fff;font-weight:600;border-radius:0 0 8px 8px;text-decoration:none;transition:top .2s ease}.skip-link:focus{top:0}:focus-visible{outline:2px solid #06b6d4;outline-offset:2px}.brush{font-family:Zen Old Mincho,serif;font-weight:400;font-style:normal}a{color:#06b6d4;text-decoration:none;transition:color .2s ease}a:hover{color:#0891b2}.global-nav{position:fixed;top:0;left:0;right:0;z-index:1000;transition:background .3s ease,box-shadow .3s ease}.global-nav.is-scrolled{background:#060a14d9;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:0 1px #06b6d41a}.nav-inner{max-width:1000px;margin:0 auto;padding:0 2.5rem;display:flex;align-items:center;justify-content:space-between;height:64px}.nav-logo{display:flex;align-items:center;text-decoration:none}.nav-logo-img{height:28px;width:auto}.nav-logo-dark{display:none}.global-nav.is-scrolled .nav-logo-white{display:block}.global-nav.is-scrolled .nav-logo-dark{display:none}.nav-links{list-style:none;display:flex;gap:2rem}.nav-link{font-size:.85rem;font-weight:500;color:#ffffffa6;text-decoration:none;letter-spacing:.06em;transition:color .2s ease}.nav-link:hover{color:#06b6d4}.nav-hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;width:32px;height:32px;background:none;border:none;cursor:pointer;padding:4px}.nav-hamburger span{display:block;width:100%;height:2px;background:#fffc;border-radius:2px;transition:transform .3s ease,opacity .3s ease}.nav-hamburger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}.nav-hamburger.is-open span:nth-child(2){opacity:0}.nav-hamburger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}.mobile-menu{position:fixed;inset:0;z-index:999;background:#060a14f2;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .3s ease}.mobile-menu.is-open{opacity:1;pointer-events:auto}.mobile-menu-links{list-style:none;text-align:center}.mobile-menu-links li{margin-bottom:2rem}.mobile-menu-link{font-size:1.5rem;font-weight:600;color:#fff;text-decoration:none;letter-spacing:.1em;transition:color .2s ease}.mobile-menu-link:hover{color:#06b6d4}.footer{background:#060a14;text-align:center;padding:3.5rem 0;border-top:1px solid rgba(6,182,212,.1)}.footer-links{display:flex;justify-content:center;gap:2rem;margin-bottom:2rem;flex-wrap:wrap}.footer-links a{font-size:.85rem;color:#ffffff80;text-decoration:none;transition:color .2s ease}.footer-links a:hover{color:#06b6d4}.footer-info{margin-bottom:1rem}.powered-by{font-family:Inter,sans-serif;font-size:.8rem;color:#5a6a8a;letter-spacing:.05em;margin-bottom:.5rem}.footer-company{display:inline-flex;align-items:center;gap:8px;margin-bottom:.4rem;text-decoration:none;transition:opacity .2s ease}.footer-company:hover{opacity:.8}.ys-icon{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;background:linear-gradient(135deg,#1a56db,#06b6d4);border-radius:7px;color:#fff;font-family:Inter,sans-serif;font-weight:700;font-size:13px;letter-spacing:-.5px}.ys-text{font-family:Inter,sans-serif;font-weight:600;font-size:.95rem;color:#fff;letter-spacing:-.02em}.ys-text span{color:#06b6d4}.footer-copy{font-size:.75rem;color:#4a5a7a}.page-header{background:linear-gradient(160deg,#060a14,#0a1628 40%,#0d1f3c);padding:8rem 0 4rem;text-align:center}.page-title{font-size:1.5rem;font-weight:600;letter-spacing:.15em;text-transform:uppercase;color:#06b6d4;margin-bottom:.5rem}.page-title:after{content:"";display:block;width:32px;height:2px;background:#06b6d4;margin:.75rem auto 0;opacity:.4}.page-subtitle{font-size:1rem;color:#ffffff80;margin-top:1rem}.page-body{background:#f7f8fa;padding:4rem 0}.page-content{max-width:760px;margin:0 auto;padding:0 2.5rem}.page-content h2{font-size:1.2rem;font-weight:600;color:#0a2351;margin-top:3rem;margin-bottom:1rem;padding-bottom:.5rem;border-bottom:1px solid #e2e6ec}.page-content h2:first-child{margin-top:0}.page-content p{font-size:.95rem;color:#5a6a7a;line-height:2;margin-bottom:1rem}.page-content ul,.page-content ol{font-size:.95rem;color:#5a6a7a;line-height:2;margin-bottom:1rem;padding-left:1.5rem}.page-content li{margin-bottom:.25rem}.page-content strong{color:#0a2351;font-weight:600}.page-content a{color:#06b6d4;text-decoration:none;border-bottom:1px solid rgba(6,182,212,.3);transition:border-color .2s ease}.page-content a:hover{border-color:#06b6d4}@media(max-width:768px){.nav-links{display:none}.nav-hamburger{display:flex}.page-header{padding:6rem 0 3rem}.page-body{padding:3rem 0}.page-content{padding:0 1.5rem}.footer-links{flex-direction:column;gap:1rem}}