/* ===== Reset & Variables ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --ink:#0a0a0f;--white:#fafaf9;--accent:#0066ff;--accent-light:#3d8bff;
  --gray-100:#f4f4f2;--gray-200:#e8e8e4;--gray-400:#9c9c96;--gray-600:#5a5a54;
  --orange:#ff6b2b;--green:#00c27a;--radius:16px;
  --font-jp:'Noto Sans JP',sans-serif;--font-en:'DM Sans',sans-serif;--font-display:'Syne',sans-serif;
}
html{scroll-behavior:smooth}
body{font-family:var(--font-jp);color:var(--ink);background:var(--white);line-height:1.8;overflow-x:hidden;-webkit-font-smoothing:antialiased}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:120px 0}

/* ===== Accessibility: Skip Link ===== */
.skip-link{position:absolute;left:-9999px;top:0;z-index:9999;padding:12px 24px;background:var(--accent);color:#fff;font-size:14px;font-weight:700;text-decoration:none;border-radius:0 0 8px 0}
.skip-link:focus{left:0;top:0}

/* ===== Accessibility: Focus Visible ===== */
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ===== Animations ===== */
@keyframes fadeUp{from{opacity:0;transform:translateY(40px)}to{opacity:1;transform:translateY(0)}}
.animate{opacity:0;transform:translateY(40px);transition:all .8s cubic-bezier(.16,1,.3,1)}
.animate.visible{opacity:1;transform:translateY(0)}
.animate-delay-1{transition-delay:.1s}
.animate-delay-2{transition-delay:.2s}
.animate-delay-3{transition-delay:.3s}
.animate-delay-4{transition-delay:.4s}

/* ===== Header (subpage default: solid) ===== */
header{position:fixed;top:0;left:0;right:0;z-index:100;padding:20px 0;transition:all .4s;background:rgba(250,250,249,.92);backdrop-filter:blur(20px);box-shadow:0 1px 0 rgba(0,0,0,.06)}
header .container{display:flex;align-items:center;justify-content:space-between}
.logo{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-en);font-size:24px;font-weight:700;color:var(--ink);text-decoration:none;letter-spacing:-.5px}
.logo-icon{height:36px;width:auto;flex-shrink:0}
nav{display:flex;align-items:center;gap:28px}
nav a{font-family:var(--font-jp);font-size:13px;font-weight:500;color:var(--gray-600);text-decoration:none;letter-spacing:0;transition:color .3s}
nav a:hover{color:var(--ink)}
.nav-cta{background:var(--ink)!important;color:#fff!important;padding:10px 24px;border-radius:100px;font-size:13px!important;border:1px solid var(--ink)!important;transition:all .3s!important}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.2)}
.mobile-menu-btn{display:none;background:none;border:none;cursor:pointer;padding:8px;-webkit-appearance:none;appearance:none}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:16px 36px;border-radius:100px;font-family:var(--font-jp);font-size:15px;font-weight:500;text-decoration:none;transition:all .3s cubic-bezier(.16,1,.3,1);cursor:pointer;border:none}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 32px rgba(0,102,255,.4)}
.btn-outline{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.25)}
.btn-outline:hover{border-color:rgba(255,255,255,.6);transform:translateY(-2px)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{transform:translateY(-3px);box-shadow:0 12px 32px rgba(0,0,0,.3)}
.btn-orange{background:var(--orange);color:#fff}
.btn-orange:hover{transform:translateY(-3px);box-shadow:0 12px 32px rgba(255,107,43,.4)}

/* ===== Page Hero (shared by subpages) ===== */
.page-hero{padding:160px 0 80px;background:var(--ink);color:#fff;position:relative;overflow:hidden}
.page-hero::before{content:'';position:absolute;top:50%;right:-10%;width:500px;height:500px;background:radial-gradient(circle,rgba(0,102,255,.12) 0%,transparent 70%);transform:translateY(-50%)}
.page-hero .container{position:relative;z-index:2}
.page-hero-label{font-family:var(--font-en);font-size:12px;font-weight:700;letter-spacing:4px;text-transform:uppercase;color:var(--accent-light);margin-bottom:16px}
.page-hero h1{font-size:clamp(32px,5vw,52px);font-weight:900;line-height:1.3;letter-spacing:-1px}
.page-hero p{font-size:16px;color:rgba(255,255,255,.7);margin-top:16px;max-width:600px}
.page-content{padding:80px 0 120px}

/* ===== CTA Section ===== */
.cta{background:var(--ink);padding:80px 0;text-align:center;position:relative;overflow:hidden}
.cta::before{content:'';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:600px;height:600px;background:radial-gradient(circle,rgba(0,102,255,.12) 0%,transparent 70%)}
.cta .container{position:relative;z-index:2}
.cta h2{color:#fff;font-size:clamp(24px,3.5vw,36px);font-weight:900;margin-bottom:12px}
.cta p{color:rgba(255,255,255,.7);font-size:15px;margin-bottom:32px;line-height:1.9}
.cta-buttons{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}

/* ===== Footer ===== */
footer{background:var(--ink);border-top:1px solid rgba(255,255,255,.06);padding:60px 0 40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;margin-bottom:48px}
.footer-brand .logo{color:#fff}
.footer-desc{font-size:13px;color:rgba(255,255,255,.7);margin-top:16px;line-height:1.9}
.footer-heading{font-size:12px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:rgba(255,255,255,.7);margin-bottom:20px;font-family:var(--font-en)}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:12px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.7);text-decoration:none;transition:color .3s}
.footer-links a:hover{color:#fff}
.footer-bottom{padding-top:32px;border-top:1px solid rgba(255,255,255,.06);display:flex;justify-content:space-between;align-items:center}
.footer-copy{font-family:var(--font-en);font-size:12px;color:rgba(255,255,255,.7)}

/* ===== Section Label (shared) ===== */
.section-label{font-family:var(--font-en);font-size:12px;font-weight:700;letter-spacing:4px;text-transform:uppercase;color:var(--accent);margin-bottom:16px}
.section-title{font-size:clamp(26px,3.5vw,40px);font-weight:900;line-height:1.3;margin-bottom:20px;letter-spacing:-.5px}
.section-desc{font-size:15px;color:var(--gray-600);max-width:640px;line-height:2;margin-bottom:48px}
.section-center{text-align:center}
.section-center .section-desc{margin-left:auto;margin-right:auto}

/* ===== Active Nav ===== */
nav a.active{color:var(--accent)!important;font-weight:700}

/* ===== Accessibility: Reduced Motion ===== */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .animate{opacity:1;transform:none}
}

/* ===== Responsive (common) ===== */
@media(max-width:768px){
  nav{display:none;position:absolute;top:100%;left:0;right:0;background:rgba(250,250,249,.98);backdrop-filter:blur(20px);flex-direction:column;padding:16px 24px 24px;gap:0;box-shadow:0 8px 32px rgba(0,0,0,.1);border-top:1px solid var(--gray-200)}
  nav.open{display:flex}
  nav a{padding:14px 0;font-size:15px;border-bottom:1px solid var(--gray-200);width:100%}
  nav a:last-child{border-bottom:none}
  nav .nav-cta{margin-top:12px;text-align:center;border-bottom:none!important}
  .mobile-menu-btn{display:flex!important;flex-direction:column;justify-content:center;align-items:center;gap:5px;width:40px;height:40px;background:none;border:none}
  .mobile-menu-btn span{display:block;width:22px;height:2px;background:var(--ink);transition:all .3s;transform-origin:center;margin:0}
  .mobile-menu-btn.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
  .mobile-menu-btn.active span:nth-child(2){opacity:0}
  .mobile-menu-btn.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
  header .container{position:relative}
  .section{padding:80px 0}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;gap:12px}
}