:root{--font-main:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic UI","Yu Gothic","Segoe UI",Meiryo,Roboto,Arial,sans-serif;--bg:#0e0f1a;--bg-alt:#15172a;--surface:#1b1e33;--surface-2:#22263f;--border:#2c3050;--text:#eef0fb;--text-dim:#cad0fa;--accent:#ff5fa2;--accent-2:#7c5cff;--accent-gradient:linear-gradient(135deg,#ff5fa2 0%,#7c5cff 100%);--success:#4ade80;--shadow:0 10px 30px #00000059;--radius:16px}
[data-theme="light"]{--bg:#f6f6fb;--bg-alt:#fff;--surface:#fff;--surface-2:#f0f0fa;--border:#e2e2f0;--text:#0c0c18;--text-dim:#0f122b;--shadow:0 8px 24px #1e1e3c14}
*,::before,::after{box-sizing:border-box}
html{scroll-behavior:smooth}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:var(--bg-alt)}
::-webkit-scrollbar-thumb{background:var(--accent-gradient);border-radius:999px;border:2px solid var(--bg-alt)}
::-webkit-scrollbar-thumb:hover{background:var(--accent-2)}
html{scrollbar-width:thin;scrollbar-color:var(--accent-2) var(--bg-alt)}
body{margin:0;font-family:var(--font-main);background:var(--bg);color:var(--text);line-height:1.75;-webkit-font-smoothing:antialiased;transition:background .25s ease,color .25s ease}
img{max-width:100%;display:block}
a{color:inherit}
.container{width:100%;max-width:1100px;margin:0 auto;padding:0 16px}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.site-header{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg-alt) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:1.25rem;text-decoration:none;color:var(--text)}
.brand-badge{width:34px;height:34px;border-radius:10px;background:var(--accent-gradient);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1rem}
.main-nav{display:flex;gap:4px}
.main-nav a{text-decoration:none;padding:10px 14px;border-radius:10px;font-size:.95rem;color:var(--text-dim);font-weight:600;transition:background .15s,color .15s}
.main-nav a:hover,.main-nav a[aria-current="page"]{background:var(--surface-2);color:var(--text)}
.header-actions{display:flex;align-items:center;gap:8px}
.icon-btn{width:40px;height:40px;border-radius:10px;border:1px solid var(--border);background:var(--surface);color:var(--text);display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1.05rem;transition:transform .15s,background .15s}
.icon-btn:hover{background:var(--surface-2)}
.icon-btn:active{transform:scale(.94)}
.hamburger{display:none}
.mobile-nav{display:none;flex-direction:column;border-top:1px solid var(--border);background:var(--bg-alt)}
.mobile-nav a{padding:14px 16px;text-decoration:none;color:var(--text);border-bottom:1px solid var(--border);font-weight:600}
.mobile-nav.open{display:flex}
@media (max-width:820px) {
.main-nav{display:none}
.hamburger{display:flex}
}
.hero{padding:28px 0 8px}
.hero-head{text-align:center;max-width:760px;margin:0 auto 20px}
.eyebrow{display:inline-block;padding:5px 12px;border-radius:999px;background:var(--surface-2);color:var(--accent);font-weight:700;font-size:.8rem;letter-spacing:.03em;margin-bottom:12px}
.hero-head h1{font-size:clamp(1.6rem,4vw,2.4rem);margin:0 0 10px;font-weight:800}
.hero-head p{color:var(--text-dim);margin:0;font-size:1.02rem}
.game-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px}
.game-toolbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:space-between;margin-bottom:12px}
.game-toolbar .left{display:flex;align-items:center;gap:8px}
.status-dot{width:9px;height:9px;border-radius:50%;background:var(--success);box-shadow:0 0 0 4px color-mix(in srgb,var(--success) 25%,transparent)}
.game-title-mini{font-weight:700;font-size:.95rem}
.toolbar-btns{display:flex;gap:8px}
.toolbar-btns button{border:1px solid var(--border);background:var(--surface-2);color:var(--text);border-radius:10px;padding:9px 14px;font-family:var(--font-main);font-weight:700;font-size:.88rem;cursor:pointer;display:flex;align-items:center;gap:6px;transition:background .15s,transform .15s}
.toolbar-btns button:hover{background:var(--border)}
.toolbar-btns button:active{transform:scale(.96)}
.game-frame-wrap{position:relative;width:100%;aspect-ratio:16/9;background:#000;border-radius:12px;overflow:hidden;min-height:280px}
.game-frame-wrap iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.game-frame-wrap:fullscreen{aspect-ratio:auto}
.game-frame-wrap:fullscreen iframe{width:100vw;height:100vh}
.game-loading{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;color:#cfd2ee;background:#0b0c16;font-size:.9rem}
.spinner{width:34px;height:34px;border-radius:50%;border:3px solid #ffffff26;border-top-color:var(--accent);animation:spin 1s linear infinite}
@keyframes spin {
to{transform:rotate(360deg)}
}
.share-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;align-items:center}
.share-row span{color:var(--text-dim);font-weight:700;font-size:.85rem;margin-right:2px}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 13px;border-radius:999px;border:1px solid var(--border);background:var(--surface-2);text-decoration:none;color:var(--text);font-size:.85rem;font-weight:700;cursor:pointer;font-family:var(--font-main);transition:background .15s,transform .15s}
.share-btn:hover{background:var(--border)}
.share-btn:active{transform:scale(.96)}
.ad-slot{display:flex;align-items:center;justify-content:center;margin:22px auto;background:var(--surface);border:1px dashed var(--border);border-radius:12px;color:var(--text-dim);font-size:.78rem;overflow:hidden}
.ad-desktop{width:728px;height:90px;max-width:100%}
.ad-mobile{width:300px;height:250px;max-width:100%;display:none}
@media (max-width:900px) {
.ad-desktop{display:none}
.ad-mobile{display:flex}
}
section.block{padding:34px 0}
section.block h2{font-size:clamp(1.3rem,3vw,1.7rem);margin:0 0 14px;font-weight:800}
.prose{color:var(--text-dim)}
.prose p{margin:0 0 14px}
.card-grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.info-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:18px}
.info-card h3{margin:0 0 8px;font-size:1.02rem}
.info-card p{margin:0;color:var(--text-dim);font-size:.92rem}
.steps{counter-reset:step;list-style:none;padding:0;margin:0;display:grid;gap:12px}
.steps li{counter-increment:step;display:flex;gap:14px;align-items:flex-start;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:16px}
.steps li::before{content:counter(step);flex:0 0 auto;width:34px;height:34px;border-radius:10px;background:var(--accent-gradient);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center}
.steps li div h3{margin:0 0 4px;font-size:1rem}
.steps li div p{margin:0;color:var(--text-dim);font-size:.92rem}
.faq-item{border:1px solid var(--border);border-radius:14px;margin-bottom:10px;background:var(--surface);overflow:hidden}
.faq-item summary{cursor:pointer;padding:16px;font-weight:700;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:10px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:1.3rem;color:var(--text-dim)}
.faq-item[open] summary::after{content:"–"}
.faq-item p{margin:0;padding:0 16px 16px;color:var(--text-dim)}
.cta-box{background:var(--accent-gradient);border-radius:18px;padding:26px;color:#fff;text-align:center}
.cta-box h2{margin:0 0 8px;color:#fff}
.cta-box p{margin:0 0 16px;opacity:.92}
.cta-box a{display:inline-block;background:#fff;color:#25264a;font-weight:800;text-decoration:none;padding:12px 22px;border-radius:999px}
.tips-list{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.tips-list li{display:flex;gap:10px;align-items:flex-start;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:14px 16px;color:var(--text-dim);font-size:.93rem}
.tips-list li::before{content:"✔";color:var(--accent);font-weight:800;flex:0 0 auto}
.stat-strip{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));margin-top:18px}
.stat-item{text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:16px 10px}
.stat-item strong{display:block;font-size:1.4rem;color:var(--accent)}
.stat-item span{font-size:.8rem;color:var(--text-dim)}
.site-footer{border-top:1px solid var(--border);background:var(--bg-alt);margin-top:30px;padding:34px 0 20px}
.footer-grid{display:grid;gap:24px;grid-template-columns:2fr 1fr 1fr;margin-bottom:20px}
.footer-grid h4{margin:0 0 10px;font-size:.95rem}
.footer-grid ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.footer-grid a{text-decoration:none;color:var(--text-dim);font-size:.9rem}
.footer-grid a:hover{color:var(--text)}
.footer-brand p{color:var(--text-dim);font-size:.88rem;max-width:340px}
.footer-bottom{border-top:1px solid var(--border);padding-top:16px;display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;color:var(--text-dim);font-size:.8rem}
.disclaimer{font-size:.76rem;color:var(--text-dim);opacity:.8;line-height:1.6;margin-top:14px;padding-top:14px;border-top:1px dashed var(--border)}
@media (max-width:720px) {
.footer-grid{grid-template-columns:1fr 1fr}
.footer-brand{grid-column:1/-1}
}