*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
body{font-family:'Noto Sans JP',sans-serif;background:#030712;color:#cbd5e1;line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{border:none;background:none;cursor:pointer;font:inherit;color:inherit}
:root{--gold:#d4a574;--rose:#e8a0bf;--bg:#030712;--surface:#0f172a;--surface2:#1e293b;--border:rgba(255,255,255,0.06);--border2:rgba(255,255,255,0.1);--text1:#f1f5f9;--text2:#cbd5e1;--text3:#94a3b8;--text4:#64748b;--radius:16px;--radius-sm:10px;--radius-xs:6px}

.container{max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 32px}}
@media(min-width:1024px){.container{padding:0 40px}}

.header{position:sticky;top:0;z-index:100;backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);background:rgba(3,7,18,0.8);border-bottom:1px solid var(--border);transition:box-shadow .3s}
.header.scrolled{box-shadow:0 4px 30px rgba(0,0,0,0.3)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-size:1.4rem;font-weight:900;background:linear-gradient(135deg,var(--gold),var(--rose));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-0.02em;white-space:nowrap}
.desktop-nav{display:none;align-items:center;gap:2px}
@media(min-width:1024px){.desktop-nav{display:flex}}
.nav-link{padding:8px 12px;font-size:.85rem;color:var(--text3);border-radius:var(--radius-xs);transition:all .2s;display:flex;align-items:center;gap:4px;font-weight:500}
.nav-link:hover{color:var(--hover-c,var(--gold));background:rgba(255,255,255,0.04)}
.dropdown-wrap{position:relative}
.dropdown-trigger svg{transition:transform .2s}
.dropdown-wrap:hover .dropdown-trigger svg{transform:rotate(180deg)}
.dropdown-menu{position:absolute;right:0;top:100%;padding:8px;min-width:220px;background:rgba(15,23,42,0.95);backdrop-filter:blur(20px);border:1px solid var(--border2);border-radius:var(--radius-sm);box-shadow:0 20px 50px rgba(0,0,0,0.4);opacity:0;visibility:hidden;transform:translateY(8px);transition:all .2s;z-index:200}
.dropdown-wrap:hover .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown-item{display:block;padding:8px 14px;font-size:.84rem;color:var(--text3);border-radius:var(--radius-xs);transition:all .15s}
.dropdown-item:hover{color:var(--hover-c,var(--gold));background:rgba(255,255,255,0.05)}
.header-actions{display:flex;align-items:center;gap:4px}
.search-btn,.hamburger{padding:8px;color:var(--text3);border-radius:var(--radius-xs);transition:all .2s}
.search-btn:hover,.hamburger:hover{color:var(--text1);background:rgba(255,255,255,0.05)}
@media(min-width:1024px){.hamburger{display:none}}

.mobile-menu{position:fixed;inset:0;z-index:200;background:rgba(3,7,18,0.97);backdrop-filter:blur(24px);transform:translateX(100%);transition:transform .35s cubic-bezier(.4,0,.2,1);overflow-y:auto}
.mobile-menu.open{transform:translateX(0)}
.mobile-menu-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border)}
.mobile-nav{padding:12px;display:flex;flex-direction:column;gap:2px}
.mobile-link{display:flex;align-items:center;gap:10px;padding:12px 14px;font-size:.92rem;color:var(--text2);border-radius:var(--radius-xs);transition:all .15s}
.mobile-link:hover{background:rgba(255,255,255,0.04);color:var(--text1)}
.mobile-link-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}
.mobile-link-count{margin-left:auto;font-size:.75rem;color:var(--text4)}
.mobile-close{color:var(--text3);padding:8px;border-radius:var(--radius-xs)}
.mobile-close:hover{color:var(--text1);background:rgba(255,255,255,0.05)}

.search-overlay{position:fixed;inset:0;z-index:300;background:rgba(3,7,18,0.7);backdrop-filter:blur(8px);opacity:0;visibility:hidden;transition:all .2s;display:flex;align-items:flex-start;justify-content:center;padding-top:min(20vh,160px)}
.search-overlay.open{opacity:1;visibility:visible}
.search-modal{width:90%;max-width:600px;background:rgba(15,23,42,0.98);border:1px solid var(--border2);border-radius:var(--radius);box-shadow:0 25px 60px rgba(0,0,0,0.5);overflow:hidden;transform:translateY(-10px) scale(.98);transition:transform .2s}
.search-overlay.open .search-modal{transform:translateY(0) scale(1)}
.search-input-wrap{display:flex;align-items:center;gap:12px;padding:16px 20px;border-bottom:1px solid var(--border);color:var(--text3)}
.search-input-wrap input{flex:1;background:none;border:none;outline:none;font:inherit;font-size:1rem;color:var(--text1)}
.search-input-wrap input::placeholder{color:var(--text4)}
.search-input-wrap kbd{font-size:.7rem;padding:2px 8px;border-radius:4px;background:rgba(255,255,255,0.06);color:var(--text4);font-family:inherit}
.search-results{max-height:400px;overflow-y:auto;padding:8px}
.search-result{display:block;padding:12px 14px;border-radius:var(--radius-xs);transition:background .15s}
.search-result:hover{background:rgba(255,255,255,0.04)}
.search-result-title{font-size:.88rem;color:var(--text1);line-height:1.5}
.search-result-cat{font-size:.75rem;color:var(--text4);margin-top:2px}
.search-empty{padding:24px;text-align:center;color:var(--text4);font-size:.9rem}

.hero{position:relative;overflow:hidden;padding:80px 0 60px}
@media(min-width:768px){.hero{padding:120px 0 80px}}
@media(min-width:1024px){.hero{padding:140px 0 100px}}
.hero-bg{position:absolute;inset:0;overflow:hidden}
.hero-orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.35;animation:orbFloat 20s ease-in-out infinite}
.hero-orb:nth-child(1){width:500px;height:500px;background:rgba(212,165,116,0.15);top:-10%;left:-5%;animation-delay:0s}
.hero-orb:nth-child(2){width:400px;height:400px;background:rgba(232,160,191,0.12);bottom:-10%;right:-5%;animation-delay:-7s}
.hero-orb:nth-child(3){width:300px;height:300px;background:rgba(139,92,246,0.08);top:40%;left:50%;animation-delay:-14s}
@keyframes orbFloat{0%,100%{transform:translate(0,0) scale(1)}25%{transform:translate(30px,-30px) scale(1.05)}50%{transform:translate(-20px,20px) scale(.95)}75%{transform:translate(20px,10px) scale(1.02)}}
.hero-inner{position:relative;z-index:1;max-width:800px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;border-radius:100px;background:rgba(212,165,116,0.1);border:1px solid rgba(212,165,116,0.2);font-size:.82rem;color:var(--gold);font-weight:500;margin-bottom:20px}
.hero-badge-dot{width:6px;height:6px;border-radius:50%;background:var(--gold);animation:pulse 2s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero-title{font-size:clamp(2.5rem,6vw,4.5rem);font-weight:900;color:var(--text1);line-height:1.15;letter-spacing:-0.03em}
.hero-title-accent{background:linear-gradient(135deg,var(--gold) 0%,var(--rose) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{font-size:clamp(1rem,2vw,1.2rem);color:var(--text3);margin-top:20px;line-height:1.8;max-width:600px}
.hero-stats{display:flex;gap:32px;margin-top:32px}
.hero-stat{display:flex;flex-direction:column;gap:2px}
.hero-stat strong{font-size:1.8rem;font-weight:900;color:var(--text1)}
.hero-stat span{font-size:.8rem;color:var(--text4)}
.hero-actions{display:flex;gap:12px;margin-top:36px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:var(--radius-sm);font-weight:700;font-size:.9rem;transition:all .25s;cursor:pointer}
.btn-primary{background:linear-gradient(135deg,var(--gold),#c4956a);color:#030712;box-shadow:0 4px 20px rgba(212,165,116,0.25)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(212,165,116,0.35)}
.btn-secondary{border:1px solid var(--border2);color:var(--text2)}
.btn-secondary:hover{border-color:rgba(212,165,116,0.3);color:var(--gold)}

.section{padding:60px 0}
@media(min-width:768px){.section{padding:80px 0}}
.section-header{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:36px;gap:16px;flex-wrap:wrap}
.section-title{font-size:clamp(1.5rem,3vw,2rem);font-weight:900;color:var(--text1);letter-spacing:-0.02em}
.section-subtitle{font-size:.88rem;color:var(--text4);margin-top:4px}
.section-link{font-size:.85rem;color:var(--text4);font-weight:500;transition:color .2s;display:flex;align-items:center;gap:4px;white-space:nowrap}
.section-link:hover{color:var(--gold)}
.section-divider{height:1px;background:linear-gradient(90deg,transparent,var(--border),transparent);margin:0 auto;max-width:400px}

.card{display:block;text-decoration:none;color:inherit}
.card-inner{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);background:rgba(15,23,42,0.4);transition:all .35s cubic-bezier(.4,0,.2,1);backdrop-filter:blur(8px)}
.card-inner:hover{transform:translateY(-4px);border-color:var(--cat-border);box-shadow:0 20px 50px rgba(0,0,0,0.3),0 0 0 1px var(--cat-border)}
.card-pattern{position:absolute;inset:0;background:linear-gradient(135deg,var(--cat-bg),transparent 60%);opacity:.7;transition:opacity .35s}
.card-inner:hover .card-pattern{opacity:1}
.card-body{position:relative;z-index:1;padding:20px}
@media(min-width:768px){.card-body{padding:24px}}
.card-meta{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.cat-badge{font-size:.72rem;font-weight:600;padding:3px 10px;border-radius:100px;white-space:nowrap;letter-spacing:.02em}
.card-time{font-size:.72rem;color:var(--text4)}
.card-title{font-size:.92rem;font-weight:700;color:var(--text1);line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s}
.card-inner:hover .card-title{color:var(--cat-c)}
.card-footer{margin-top:12px;display:flex;align-items:center;justify-content:space-between}
.card-footer time{font-size:.75rem;color:var(--text4)}

.featured-grid{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:768px){.featured-grid{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.featured-grid{grid-template-columns:2fr 1fr 1fr}}
.featured-card .card-body{padding:28px;display:flex;flex-direction:column;justify-content:flex-end;min-height:220px}
@media(min-width:768px){.featured-card .card-body{min-height:280px;padding:32px}}
.featured-card .card-title{font-size:1.1rem;-webkit-line-clamp:3}
@media(min-width:768px){.featured-card .card-title{font-size:1.3rem}}

.articles-grid{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:640px){.articles-grid{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.articles-grid{grid-template-columns:1fr 1fr 1fr}}

.content-layout{display:grid;gap:32px;grid-template-columns:1fr}
@media(min-width:1024px){.content-layout{grid-template-columns:1fr 300px}}

.sidebar-box{background:rgba(15,23,42,0.5);border:1px solid var(--border);border-radius:var(--radius);padding:20px;backdrop-filter:blur(8px)}
.sidebar-title{font-size:.82rem;font-weight:700;color:var(--text3);margin-bottom:14px;display:flex;align-items:center;gap:8px}
.sidebar-title::before{content:'';display:block;width:3px;height:14px;border-radius:2px;background:var(--gold)}
.sidebar-link{display:flex;align-items:center;justify-content:space-between;padding:8px 10px;border-radius:var(--radius-xs);font-size:.84rem;color:var(--text4);transition:all .15s}
.sidebar-link:hover{background:rgba(255,255,255,0.03);color:var(--gold)}
.sidebar-count{font-size:.7rem;color:var(--text4)}

.category-grid{display:grid;gap:12px;grid-template-columns:repeat(2,1fr)}
@media(min-width:640px){.category-grid{grid-template-columns:repeat(3,1fr)}}
@media(min-width:768px){.category-grid{grid-template-columns:repeat(4,1fr)}}
@media(min-width:1024px){.category-grid{grid-template-columns:repeat(6,1fr)}}
.category-card{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);padding:20px 16px;transition:all .3s cubic-bezier(.4,0,.2,1);text-align:center}
.category-card::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,var(--cc-bg),rgba(15,23,42,0.6));transition:opacity .3s;opacity:.7}
.category-card:hover{transform:translateY(-3px);border-color:var(--cc-border);box-shadow:0 16px 40px rgba(0,0,0,0.25)}
.category-card:hover::before{opacity:1}
.category-card-inner{position:relative;z-index:1}
.category-card h3{font-size:.92rem;font-weight:700;color:var(--text1);margin-bottom:4px;transition:color .2s}
.category-card:hover h3{color:var(--cc-c)}
.category-card p{font-size:.78rem;color:var(--text4)}

.article-header{max-width:800px;margin:0 auto;padding:40px 0 0}
@media(min-width:768px){.article-header{padding:60px 0 0}}
.article-breadcrumb{display:flex;align-items:center;gap:6px;font-size:.78rem;color:var(--text4);flex-wrap:wrap;margin-bottom:20px}
.article-breadcrumb a{color:var(--text4);transition:color .2s}
.article-breadcrumb a:hover{color:var(--gold)}
.article-breadcrumb .sep{color:var(--text4);opacity:.4}
.article-cat{display:inline-flex;align-items:center;gap:6px;font-size:.78rem;font-weight:600;padding:4px 14px;border-radius:100px;margin-bottom:16px}
.article-title{font-size:clamp(1.5rem,4vw,2.4rem);font-weight:900;color:var(--text1);line-height:1.35;letter-spacing:-0.02em}
.article-meta{display:flex;align-items:center;gap:16px;margin-top:16px;font-size:.82rem;color:var(--text4);flex-wrap:wrap}
.article-meta-item{display:flex;align-items:center;gap:4px}

.article-body{max-width:800px;margin:0 auto}
.prose{padding-top:32px}
.prose h1{font-size:2rem;font-weight:900;color:var(--text1);margin:2rem 0 1rem;line-height:1.4;letter-spacing:-0.02em}
.prose h2{font-size:1.45rem;font-weight:800;color:var(--text1);margin:2.5rem 0 1rem;padding-bottom:.6rem;border-bottom:2px solid rgba(212,165,116,0.25);line-height:1.5}
.prose h3{font-size:1.2rem;font-weight:700;color:var(--text2);margin:2rem 0 .75rem;line-height:1.5}
.prose h4{font-size:1.05rem;font-weight:600;color:var(--text2);margin:1.5rem 0 .5rem}
.prose p{color:var(--text2);margin:1rem 0;line-height:2;font-size:.95rem}
.prose strong{color:var(--text1);font-weight:700}
.prose a{color:var(--gold);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;transition:color .2s}
.prose a:hover{color:var(--rose)}
.prose ul,.prose ol{color:var(--text2);margin:1rem 0;padding-left:1.5rem}
.prose li{margin:.35rem 0;line-height:1.9}
.prose ul li{list-style-type:disc}
.prose ol li{list-style-type:decimal}
.prose blockquote{border-left:3px solid var(--gold);padding:1rem 1.25rem;margin:1.5rem 0;background:rgba(212,165,116,0.04);border-radius:0 var(--radius-sm) var(--radius-sm) 0}
.prose blockquote p{color:var(--text3);margin:.25rem 0;font-size:.92rem}
.prose hr{border:none;border-top:1px solid var(--border);margin:2.5rem 0}
.prose table{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:.88rem;border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden}
.prose thead{background:rgba(212,165,116,0.08)}
.prose th{padding:10px 14px;text-align:left;color:var(--gold);font-weight:600;border-bottom:1px solid var(--border2);font-size:.82rem;text-transform:uppercase;letter-spacing:.03em}
.prose td{padding:10px 14px;color:var(--text2);border-bottom:1px solid var(--border)}
.prose tr:last-child td{border-bottom:none}
.prose tr:hover td{background:rgba(255,255,255,0.015)}
.prose img{border-radius:var(--radius-sm);max-width:100%;margin:1.5rem 0}
.prose code{background:rgba(212,165,116,0.1);color:var(--gold);padding:2px 6px;border-radius:4px;font-size:.85em}
.prose .headerlink{display:none}
.prose .toc{background:rgba(15,23,42,0.6);border:1px solid rgba(212,165,116,0.15);border-radius:var(--radius);padding:20px 24px;margin:24px 0 32px;backdrop-filter:blur(8px)}
.prose .toc>ul{padding-left:0}
.prose .toc ul{padding-left:1rem;list-style:none}
.prose .toc li{margin:.25rem 0}
.prose .toc a{color:var(--text3);text-decoration:none;font-size:.88rem;transition:color .2s;line-height:1.7}
.prose .toc a:hover{color:var(--gold)}
.prose .toc>ul>li>a{font-weight:700;color:var(--gold);font-size:.95rem}

.related-section{max-width:800px;margin:60px auto 0;padding-top:40px;border-top:1px solid var(--border)}
.related-grid{display:grid;gap:12px;grid-template-columns:1fr}
@media(min-width:640px){.related-grid{grid-template-columns:1fr 1fr}}

.category-hero{padding:48px 0 36px;text-align:center;position:relative;overflow:hidden}
@media(min-width:768px){.category-hero{padding:64px 0 48px}}
.category-hero::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,var(--ch-bg),transparent 60%);opacity:.5}
.category-hero-inner{position:relative;z-index:1}
.category-hero h1{font-size:clamp(1.8rem,4vw,2.8rem);font-weight:900;color:var(--text1);letter-spacing:-0.02em}
.category-hero p{font-size:.95rem;color:var(--text4);margin-top:8px}

.progress-bar{position:fixed;top:0;left:0;height:3px;z-index:200;background:linear-gradient(90deg,var(--gold),var(--rose));width:0;transition:width .1s linear;opacity:0}
.progress-bar.active{opacity:1}

.back-top{position:fixed;bottom:24px;right:24px;z-index:90;width:44px;height:44px;border-radius:50%;background:rgba(15,23,42,0.9);border:1px solid var(--border2);backdrop-filter:blur(12px);display:flex;align-items:center;justify-content:center;color:var(--text3);opacity:0;visibility:hidden;transform:translateY(10px);transition:all .3s;box-shadow:0 4px 20px rgba(0,0,0,0.3)}
.back-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{color:var(--gold);border-color:rgba(212,165,116,0.3)}

.footer{border-top:1px solid var(--border);background:rgba(3,7,18,0.9);margin-top:60px;padding:60px 0 0}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr;padding-bottom:40px}
@media(min-width:768px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr}}
.footer-brand .logo{font-size:1.2rem}
.footer-desc{font-size:.84rem;color:var(--text4);margin-top:10px;line-height:1.7;max-width:280px}
.footer-stats{display:flex;gap:24px;margin-top:16px}
.footer-stat{display:flex;flex-direction:column}
.footer-stat strong{font-size:1.2rem;font-weight:800;color:var(--text1)}
.footer-stat span{font-size:.72rem;color:var(--text4)}
.footer-col{display:flex;flex-direction:column;gap:6px}
.footer-link{font-size:.82rem;color:var(--text4);transition:color .2s;padding:2px 0}
.footer-link:hover{color:var(--hover-c,var(--gold))}
.footer-bottom{border-top:1px solid var(--border);padding:24px 0;display:flex;flex-direction:column;gap:6px;text-align:center}
@media(min-width:768px){.footer-bottom{flex-direction:row;justify-content:space-between;text-align:left}}
.footer-bottom p{font-size:.72rem;color:var(--text4)}

.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s ease-out,transform .6s ease-out}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-lazy:nth-child(n+7){opacity:0;transform:translateY(20px)}
.reveal-lazy.visible{opacity:1;transform:translateY(0)}

.sidebar-sticky{position:sticky;top:80px;max-height:calc(100vh - 100px);overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--surface2) transparent}
.sidebar-sticky::-webkit-scrollbar{width:4px}
.sidebar-sticky::-webkit-scrollbar-track{background:transparent}
.sidebar-sticky::-webkit-scrollbar-thumb{background:var(--surface2);border-radius:2px}

::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--surface2);border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:var(--gold)}

::selection{background:rgba(212,165,116,0.25);color:var(--text1)}

@media(max-width:639px){
  .hero-stats{gap:20px}
  .hero-stat strong{font-size:1.4rem}
  .card-body{padding:16px}
  .section{padding:40px 0}
}