:root{--sky:#5bb8d4;--sky-light:#9fd8ea;--sky-pale:#e8f6fb;--sky-dark:#2d8aa8;--white:#ffffff;--ink:#1a2535;--ink-soft:#3d4e63;--ink-muted:#6b7f96;--border:#d0eaf4;--bg-light:#f4fbfd}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Noto Sans JP',sans-serif;color:var(--ink);background:var(--white);overflow-x:hidden}

/* NAV */
nav{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:0 48px;height:72px;background:rgba(255,255,255,0.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);transition:box-shadow 0.3s}
nav.scrolled{box-shadow:0 2px 24px rgba(91,184,212,0.12)}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.nowrap{white-space:nowrap}
.nav-logo-mark{width:36px;height:36px;object-fit:contain;display:block;flex-shrink:0}
.nav-logo-text{font-family:'Noto Sans JP',sans-serif;font-size:17px;font-weight:600;color:var(--ink);letter-spacing:0.05em}
.nav-links{display:flex;align-items:center;gap:36px;list-style:none}
.nav-links a{font-size:13.5px;font-weight:500;color:var(--ink-soft);text-decoration:none;letter-spacing:0.04em;transition:color 0.2s;position:relative}
.nav-links a::after{content:'';position:absolute;bottom:-4px;left:0;right:0;height:1.5px;background:var(--sky);transform:scaleX(0);transition:transform 0.25s}
.nav-links a:hover,.nav-links a.active{color:var(--sky-dark)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-cta{background:var(--sky)!important;color:white!important;padding:9px 22px;border-radius:6px;font-size:13px!important}
.nav-cta::after{display:none!important}
.nav-cta:hover{background:var(--sky-dark)!important}
.nav-hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px}
.nav-hamburger span{display:block;width:24px;height:2px;background:var(--ink);border-radius:2px;transition:0.3s}
.nav-mobile{display:none;position:fixed;top:72px;left:0;right:0;background:white;border-bottom:1px solid var(--border);z-index:99;flex-direction:column;padding:16px 24px 24px}
.nav-mobile.open{display:flex}
.nav-mobile a{padding:12px 0;font-size:15px;font-weight:500;color:var(--ink-soft);text-decoration:none;border-bottom:1px solid var(--border)}
.nav-mobile a:last-child{border-bottom:none}

/* PAGE HERO (sub pages) */
.page-hero{padding:140px 0 72px;background:linear-gradient(135deg,var(--bg-light) 0%,var(--sky-pale) 100%);position:relative;overflow:hidden}
.page-hero::after{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(ellipse 60% 80% at 80% 50%,rgba(91,184,212,0.08) 0%,transparent 70%)}
.page-hero-inner{max-width:1240px;margin:0 auto;padding:0 64px;position:relative}
.page-hero-label{font-family:'DM Sans',sans-serif;font-size:11px;font-weight:500;letter-spacing:0.25em;text-transform:uppercase;color:var(--sky-dark);margin-bottom:16px}
.page-hero-title{font-family:'Noto Sans JP',sans-serif;font-size:clamp(32px,5vw,64px);font-weight:300;line-height:1.15;color:var(--ink)}
.page-hero-title strong{font-weight:inherit}
.page-hero-sub{font-size:15px;line-height:1.9;color:var(--ink-muted);margin-top:20px;max-width:560px;font-weight:300}
.breadcrumb{display:flex;align-items:center;gap:8px;margin-bottom:24px;font-size:12px;color:var(--ink-muted)}
.breadcrumb a{color:var(--ink-muted);text-decoration:none;transition:color 0.2s}
.breadcrumb a:hover{color:var(--sky-dark)}
.breadcrumb span{opacity:0.5}

/* HERO (top) */
#hero{min-height:100vh;display:flex;flex-direction:column;justify-content:center;position:relative;overflow:hidden;padding:140px 0 100px}
.hero-photo{position:absolute;inset:0;background-image:url('https://images.unsplash.com/photo-1431540015161-0bf868a2d407?w=2400&q=80&auto=format&fit=crop');background-size:cover;background-position:center;background-repeat:no-repeat}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(255,255,255,0.92) 0%,rgba(255,255,255,0.86) 50%,rgba(232,246,251,0.88) 100%)}
.hero-content{position:relative;max-width:1240px;margin:0 auto;padding:0 64px}
.hero-label{display:inline-block;font-size:12px;font-weight:500;letter-spacing:0.22em;text-transform:uppercase;color:var(--sky-dark);border:1px solid var(--sky-light);padding:6px 16px;border-radius:20px;margin-bottom:40px;background:var(--sky-pale);animation:fadeSlideUp 0.8s 0.2s both}
.hero-ja{font-family:'Noto Sans JP',sans-serif;font-size:clamp(42px,6.5vw,96px);font-weight:300;line-height:1.1;letter-spacing:-0.02em;color:var(--ink);animation:fadeSlideUp 0.8s 0.4s both}
.hero-ja strong{font-weight:inherit;color:inherit}
.hero-en{font-family:'DM Sans',sans-serif;font-size:clamp(14px,1.6vw,20px);font-weight:300;letter-spacing:0.25em;color:var(--ink-muted);margin-top:20px;text-transform:uppercase;animation:fadeSlideUp 0.8s 0.55s both}
.hero-desc{font-size:16.5px;line-height:1.95;color:var(--ink-soft);margin-top:36px;max-width:580px;font-weight:300;animation:fadeSlideUp 0.8s 0.7s both}
.hero-actions{display:flex;gap:16px;margin-top:48px;animation:fadeSlideUp 0.8s 0.85s both}
.hero-stats{display:flex;gap:0;margin-top:72px;animation:fadeSlideUp 0.8s 1s both}
.stat-item{padding:24px 40px 24px 0;border-right:1px solid var(--border);margin-right:40px}
.stat-item:last-child{border-right:none;margin-right:0}
.stat-num{font-family:'DM Sans',sans-serif;font-size:44px;font-weight:300;color:var(--sky-dark);line-height:1}
.stat-num span{font-size:22px}
.stat-label{font-size:13px;color:var(--ink-muted);letter-spacing:0.05em;margin-top:8px;font-weight:400}
@keyframes fadeSlideUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}

/* BUTTONS */
.btn-primary{display:inline-flex;align-items:center;gap:8px;background:var(--sky);color:white;padding:14px 32px;border-radius:8px;font-size:14px;font-weight:500;text-decoration:none;letter-spacing:0.05em;transition:background 0.2s,transform 0.15s,box-shadow 0.2s;box-shadow:0 4px 20px rgba(91,184,212,0.3)}
.btn-primary:hover{background:var(--sky-dark);transform:translateY(-2px);box-shadow:0 8px 28px rgba(91,184,212,0.4)}
.btn-outline{display:inline-flex;align-items:center;gap:8px;border:1.5px solid var(--border);color:var(--ink-soft);padding:14px 32px;border-radius:8px;font-size:14px;font-weight:500;text-decoration:none;letter-spacing:0.05em;transition:border-color 0.2s,color 0.2s,transform 0.15s}
.btn-outline:hover{border-color:var(--sky);color:var(--sky-dark);transform:translateY(-2px)}

/* SECTIONS */
section{padding:96px 0}
.section-inner{max-width:1100px;margin:0 auto;padding:0 64px}
.section-label{font-family:'DM Sans',sans-serif;font-size:11px;font-weight:500;letter-spacing:0.25em;text-transform:uppercase;color:var(--sky-dark);margin-bottom:12px}
.section-title{font-family:'Noto Sans JP',sans-serif;font-size:clamp(26px,3.5vw,40px);font-weight:300;line-height:1.3;color:var(--ink)}
.section-title strong{font-weight:inherit}
.section-subtitle{font-size:15px;color:var(--ink-muted);line-height:1.8;margin-top:16px;max-width:560px;font-weight:300}
.section-line{width:40px;height:2px;background:var(--sky);margin-top:20px}

/* NEWS */
.news-header{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:48px}
.news-list{display:flex;flex-direction:column}
.news-item{display:flex;align-items:flex-start;gap:32px;padding:24px 0;border-bottom:1px solid var(--border);text-decoration:none;color:inherit;transition:opacity 0.2s}
.news-item:first-child{border-top:1px solid var(--border)}
.news-item:hover{opacity:0.7}
.news-date{font-family:'DM Sans',sans-serif;font-size:13px;color:var(--ink-muted);white-space:nowrap;padding-top:2px;min-width:90px;font-weight:300}
.news-tag{font-size:11px;font-weight:500;letter-spacing:0.08em;background:var(--sky-pale);color:var(--sky-dark);border:1px solid var(--sky-light);padding:3px 10px;border-radius:4px;white-space:nowrap;height:fit-content;min-width:72px;text-align:center}
.news-title-text{font-size:14.5px;font-weight:400;line-height:1.6;color:var(--ink-soft)}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:500;color:var(--sky-dark);text-decoration:none;letter-spacing:0.04em;transition:gap 0.2s}
.link-more:hover{gap:10px}
.link-more::after{content:'→'}

/* BUSINESS CARDS */
.biz-header{margin-bottom:56px}
.biz-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:24px}
.biz-card{position:relative;overflow:hidden;border-radius:16px;background:var(--bg-light);border:1px solid var(--border);padding:0 0 36px;transition:transform 0.3s,box-shadow 0.3s;text-decoration:none;color:inherit;display:block}
.biz-card:hover{transform:translateY(-6px);box-shadow:0 20px 48px rgba(91,184,212,0.15)}
.biz-card:hover .biz-card-image{transform:scale(1.05)}
.biz-card-accent{position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--sky),var(--sky-light));z-index:3}
.biz-card-imagewrap{position:relative;height:180px;overflow:hidden;border-radius:16px 16px 0 0;margin-bottom:24px}
.biz-card-image{position:absolute;inset:0;background-size:cover;background-position:center;background-repeat:no-repeat;transition:transform 0.5s ease}
.biz-card-imagewrap::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(244,251,253,0) 50%,rgba(244,251,253,0.5) 75%,var(--bg-light) 100%);pointer-events:none}
.biz-card-image.img-shogi{background-image:url('shogi.jpg')}
.biz-card-image.img-ai{background-image:url('https://images.unsplash.com/photo-1517048676732-d65bc937f952?w=800&q=80&auto=format&fit=crop')}
.biz-card-image.img-it{background-image:url('https://images.unsplash.com/photo-1498050108023-c5249f4df085?w=800&q=80&auto=format&fit=crop')}
.biz-card-body{padding:0 36px}
.biz-name{font-family:'Noto Sans JP',sans-serif;font-size:18px;font-weight:600;color:var(--ink);margin-bottom:12px;line-height:1.4}
.biz-desc{font-size:13.5px;line-height:1.85;color:var(--ink-muted);font-weight:300}
.biz-link{display:inline-flex;align-items:center;gap:6px;margin-top:24px;font-size:13px;font-weight:500;color:var(--sky-dark);text-decoration:none;transition:gap 0.2s}
.biz-link:hover{gap:10px}
.biz-link::after{content:'→'}

/* BIZ DETAIL (business page) */
.biz-detail{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center;padding:72px 0;border-bottom:1px solid var(--border)}
.biz-detail:last-child{border-bottom:none}
.biz-detail.reverse .biz-detail-img{order:-1}
.biz-detail-img{position:relative;border-radius:20px;aspect-ratio:4/3;overflow:hidden;background-size:cover;background-position:center;background-repeat:no-repeat;box-shadow:0 12px 40px rgba(91,184,212,0.15);font-size:0;color:transparent}
.biz-detail-img::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(91,184,212,0.08) 0%,transparent 50%,rgba(45,138,168,0.12) 100%);transition:opacity 0.3s}
.biz-detail-img:hover::after{opacity:0.5}
.biz-detail-img.img-shogi{background-image:url('shogi.jpg')}
.biz-detail-img.img-ai{background-image:url('https://images.unsplash.com/photo-1517048676732-d65bc937f952?w=1200&q=80&auto=format&fit=crop')}
.biz-detail-img.img-it{background-image:url('https://images.unsplash.com/photo-1498050108023-c5249f4df085?w=1200&q=80&auto=format&fit=crop')}
.biz-detail-label{font-family:'DM Sans',sans-serif;font-size:11px;font-weight:500;letter-spacing:0.2em;text-transform:uppercase;color:var(--sky-dark);margin-bottom:16px}
.biz-detail-title{font-family:'Noto Sans JP',sans-serif;font-size:clamp(22px,2.5vw,30px);font-weight:600;line-height:1.35;color:var(--ink);margin-bottom:20px}
.biz-detail-body{font-size:14px;line-height:2;color:var(--ink-soft);font-weight:300;margin-bottom:28px}
.biz-features{display:flex;flex-direction:column;gap:12px;margin-bottom:32px}
.biz-feature{display:flex;align-items:flex-start;gap:12px;font-size:13.5px;color:var(--ink-soft);font-weight:300}
.biz-feature::before{content:'✓';color:var(--sky);font-weight:700;flex-shrink:0;margin-top:1px}

/* COMPANY TABLE */
.company-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start;margin-top:56px}
.company-table{width:100%;border-collapse:collapse}
.company-table tr{border-bottom:1px solid var(--border)}
.company-table tr:first-child{border-top:1px solid var(--border)}
.company-table th{font-size:13px;font-weight:500;color:var(--ink-muted);letter-spacing:0.04em;padding:18px 0;text-align:left;width:120px;vertical-align:top}
.company-table td{font-size:14px;line-height:1.8;color:var(--ink-soft);padding:18px 0;font-weight:300}
.company-vision{background:linear-gradient(135deg,var(--sky) 0%,var(--sky-dark) 100%);border-radius:20px;padding:48px 44px;color:white}
.vision-label{font-family:'DM Sans',sans-serif;font-size:11px;letter-spacing:0.25em;text-transform:uppercase;opacity:0.7;margin-bottom:20px}
.vision-ja{font-family:'Noto Sans JP',sans-serif;font-size:28px;font-weight:300;line-height:1.4;margin-bottom:8px}
.vision-ja strong{font-weight:inherit}
.vision-en{font-family:'DM Sans',sans-serif;font-size:13px;letter-spacing:0.15em;opacity:0.7;margin-bottom:28px;text-transform:uppercase}
.vision-body{font-size:13.5px;line-height:2;opacity:0.88;font-weight:300}

/* RECRUIT */
.recruit-bg{position:absolute;inset:0;background:radial-gradient(ellipse 60% 70% at 80% 50%,rgba(91,184,212,0.12) 0%,transparent 70%)}
.recruit-inner{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.recruit-title{font-family:'Noto Sans JP',sans-serif;font-size:clamp(28px,3.5vw,42px);font-weight:300;line-height:1.4;color:white}
.recruit-title strong{font-weight:inherit;color:inherit}
.recruit-sub{font-size:14px;line-height:1.9;color:rgba(255,255,255,0.6);margin-top:20px;font-weight:300}
.recruit-cards{display:flex;flex-direction:column;gap:16px}
.recruit-card{background:rgba(255,255,255,0.05);border:1px solid rgba(91,184,212,0.2);border-radius:12px;padding:24px 28px;display:flex;align-items:center;justify-content:space-between;text-decoration:none;transition:background 0.2s,border-color 0.2s;cursor:pointer}
.recruit-card:hover{background:rgba(91,184,212,0.1);border-color:rgba(91,184,212,0.4)}
.recruit-card-title{font-size:15px;font-weight:500;color:white}
.recruit-card-tag{font-size:11.5px;color:var(--sky-light);margin-top:4px;font-weight:300}
.recruit-arrow{color:var(--sky-light);font-size:18px}

/* CONTACT */
.contact-inner{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:start}
.contact-form{display:flex;flex-direction:column;gap:20px;margin-top:40px}
.form-group{display:flex;flex-direction:column;gap:8px}
.form-label{font-size:13px;font-weight:500;color:var(--ink-soft);letter-spacing:0.03em}
.form-label .req{color:var(--sky);margin-left:4px}
.form-input,.form-textarea{border:1.5px solid var(--border);border-radius:8px;padding:12px 16px;font-size:14px;font-family:'Noto Sans JP',sans-serif;color:var(--ink);background:var(--white);outline:none;transition:border-color 0.2s;width:100%}
.form-input:focus,.form-textarea:focus{border-color:var(--sky)}
.form-textarea{resize:vertical;min-height:140px}
.form-submit{background:var(--sky);color:white;border:none;border-radius:8px;padding:14px 32px;font-size:14px;font-weight:500;font-family:'Noto Sans JP',sans-serif;letter-spacing:0.05em;cursor:pointer;transition:background 0.2s,transform 0.15s;align-self:flex-start}
.form-submit:hover{background:var(--sky-dark);transform:translateY(-2px)}
.form-submit:disabled{opacity:0.7;cursor:default;transform:none}
.form-status{font-size:13px;line-height:1.7;letter-spacing:0.02em}
.form-status:empty{display:none}
.form-status.ok{color:var(--sky-dark)}
.form-status.ng{color:#c0392b}
.contact-info{margin-top:40px}
.contact-info-title{font-family:'Noto Sans JP',sans-serif;font-size:20px;font-weight:600;color:var(--ink);margin-bottom:28px}
.info-row{display:flex;gap:16px;align-items:flex-start;margin-bottom:20px}
.info-icon{width:40px;height:40px;background:var(--sky-pale);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}
.info-label{font-size:12px;color:var(--ink-muted);font-weight:400;margin-bottom:3px}
.info-value{font-size:14.5px;color:var(--ink-soft);font-weight:400;line-height:1.5}
.info-value a{color:var(--sky-dark);text-decoration:none}

/* FOOTER */
footer{background:var(--ink);padding:64px 0 32px;color:rgba(255,255,255,0.7)}
.footer-inner{max-width:1100px;margin:0 auto;padding:0 64px}
.footer-top{display:flex;justify-content:space-between;align-items:flex-start;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,0.1);gap:64px}
.footer-tagline{font-family:'Noto Sans JP',sans-serif;font-size:14px;color:rgba(255,255,255,0.5);margin-top:12px;font-weight:300;letter-spacing:0.05em}
.footer-nav{display:flex;gap:64px}
.footer-nav-col h4{font-size:12px;font-weight:500;letter-spacing:0.12em;text-transform:uppercase;color:rgba(255,255,255,0.4);margin-bottom:16px}
.footer-nav-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-nav-col a{font-size:13.5px;color:rgba(255,255,255,0.65);text-decoration:none;transition:color 0.2s;font-weight:300}
.footer-nav-col a:hover{color:var(--sky-light)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:32px;font-size:12px;color:rgba(255,255,255,0.35)}
.footer-links{display:flex;gap:24px}
.footer-links a{color:rgba(255,255,255,0.35);text-decoration:none;transition:color 0.2s}
.footer-links a:hover{color:var(--sky-light)}

/* REVEAL */
.reveal{opacity:0;transform:translateY(32px);transition:opacity 0.7s ease,transform 0.7s ease}
.reveal.visible{opacity:1;transform:none}

/* RESPONSIVE */
@media(max-width:900px){
  nav{padding:0 24px}
  .nav-links{display:none}
  .nav-hamburger{display:flex}
  .section-inner,.footer-inner,.page-hero-inner,.hero-content{padding:0 24px}
  .biz-grid{grid-template-columns:1fr}
  .biz-detail{grid-template-columns:1fr;gap:32px}
  .biz-detail.reverse .biz-detail-img{order:0}
  .company-grid{grid-template-columns:1fr;gap:40px}
  .contact-inner{grid-template-columns:1fr;gap:40px}
  .recruit-inner{grid-template-columns:1fr;gap:40px}
  .footer-top{flex-direction:column}
  .footer-nav{flex-direction:column;gap:32px}
  #hero{padding:110px 0 72px}
  .hero-stats{flex-wrap:wrap;margin-top:56px}
  .hero-photo{background-position:65% center}
  .stat-item{padding:18px 28px 18px 0;margin-right:28px}
  .stat-num{font-size:32px}
  .stat-num span{font-size:18px}
  .stat-label{font-size:12px}
  .hero-desc{font-size:15px;margin-top:28px}
  .hero-label{margin-bottom:28px}
}

/* NEWS FULL ITEMS */
.news-item-full{padding:40px 0;border-bottom:1px solid var(--border)}
.news-item-full:first-child{border-top:1px solid var(--border)}
.news-item-header{display:flex;align-items:center;gap:16px;margin-bottom:16px}
.news-item-title{font-family:'Noto Sans JP',sans-serif;font-size:20px;font-weight:600;color:var(--ink);margin-bottom:16px;line-height:1.5}
.news-item-body{font-size:14.5px;line-height:2;color:var(--ink-soft);font-weight:300;max-width:760px}
.news-item-link{display:inline-flex;align-items:center;gap:6px;margin-top:20px;font-size:13px;font-weight:500;color:var(--sky-dark);text-decoration:none;transition:gap 0.2s}
.news-item-link:hover{gap:10px}
.filter-btn{padding:8px 20px;border-radius:20px;border:1.5px solid var(--border);background:white;color:var(--ink-soft);font-size:13px;font-weight:500;cursor:pointer;font-family:'Noto Sans JP',sans-serif;transition:0.2s}
.filter-btn:hover{border-color:var(--sky);color:var(--sky-dark)}
.filter-btn.active-filter{background:var(--sky);color:white;border-color:var(--sky)}
.legal-content{max-width:800px;margin:0 auto;font-size:14.5px;line-height:2;color:var(--ink-soft);font-weight:300}.legal-content h2{font-family:'Noto Sans JP',sans-serif;font-size:17px;font-weight:600;color:var(--ink);margin:40px 0 12px;padding-bottom:8px;border-bottom:1px solid var(--border)}.legal-content p{margin-bottom:16px}.legal-content ol{padding-left:1.5em;margin-bottom:16px}.legal-content ol li{margin-bottom:6px}