*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
--color-canvas:#f7f7f4;
--color-canvas-soft:#fafaf7;
--color-surface-card:#ffffff;
--color-surface-strong:#e6e5e0;
--color-primary:#f54e00;
--color-primary-active:#d04200;
--color-ink:#26251e;
--color-body:#5a5852;
--color-body-strong:#26251e;
--color-muted:#807d72;
--color-muted-soft:#a09c92;
--color-on-primary:#ffffff;
--color-hairline:#e6e5e0;
--color-hairline-soft:#efeee8;
--color-hairline-strong:#cfcdc4;
--color-success:#1f8a65;
--color-error:#cf2d56;
--font-sans:'Inter',system-ui,'Helvetica Neue',Helvetica,Arial,sans-serif;
--font-mono:'JetBrains Mono',monospace;
--radius-xs:4px;
--radius-sm:6px;
--radius-md:8px;
--radius-lg:12px;
--radius-xl:16px;
--radius-pill:9999px;
}

html{scroll-behavior:smooth}
body{background:var(--color-canvas);color:var(--color-body);font-family:var(--font-sans);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}

a{color:var(--color-ink);text-decoration:none}
a:hover{color:var(--color-primary)}
img{max-width:100%;height:auto;display:block}

.container{max-width:1200px;margin:0 auto;padding:0 24px}

.site-header{background:var(--color-canvas);border-bottom:1px solid var(--color-hairline);position:sticky;top:0;z-index:100}
.top-nav{display:flex;align-items:center;height:64px;gap:32px}
.nav-wordmark{font-size:16px;font-weight:600;color:var(--color-ink);letter-spacing:-0.02em;white-space:nowrap}
.nav-wordmark:hover{color:var(--color-primary)}
.nav-menu{display:flex;list-style:none;gap:24px;margin-left:auto}
.nav-menu a{font-size:14px;font-weight:500;color:var(--color-body);line-height:1.4}
.nav-menu a:hover{color:var(--color-ink)}
.nav-toggle{display:none;flex-direction:column;justify-content:space-between;width:24px;height:18px;background:none;border:none;cursor:pointer;margin-left:auto;padding:0}
.nav-toggle span{display:block;height:2px;background:var(--color-ink);border-radius:1px;transition:transform 0.2s,opacity 0.2s}

.hero-band{padding:80px 0;border-bottom:1px solid var(--color-hairline)}
.hero-label{display:inline-block;font-size:11px;font-weight:600;letter-spacing:0.88px;text-transform:uppercase;background:var(--color-surface-strong);color:var(--color-ink);padding:4px 10px;border-radius:var(--radius-pill);margin-bottom:24px}
.hero-band h1{font-size:clamp(36px,5vw,72px);font-weight:400;line-height:1.1;letter-spacing:-0.03em;color:var(--color-ink);max-width:760px;margin-bottom:20px}
.hero-band .hero-sub{font-size:16px;color:var(--color-body);max-width:560px;margin-bottom:40px;line-height:1.6}

.hero-image{margin-top:48px;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--color-hairline)}
.hero-image img{width:100%;height:420px;object-fit:cover}

.section{padding:80px 0}
.section-label{font-size:11px;font-weight:600;letter-spacing:0.88px;text-transform:uppercase;color:var(--color-muted);margin-bottom:16px}
.section-title{font-size:clamp(26px,3vw,36px);font-weight:400;letter-spacing:-0.02em;color:var(--color-ink);margin-bottom:16px}
.section-sub{font-size:16px;color:var(--color-body);max-width:560px;margin-bottom:48px;line-height:1.6}

.articles-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.article-card{background:var(--color-surface-card);border:1px solid var(--color-hairline);border-radius:var(--radius-lg);overflow:hidden;display:flex;flex-direction:column;transition:border-color 0.15s}
.article-card:hover{border-color:var(--color-hairline-strong)}
.article-card-img{height:200px;overflow:hidden}
.article-card-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.3s}
.article-card:hover .article-card-img img{transform:scale(1.03)}
.article-card-body{padding:24px;flex:1;display:flex;flex-direction:column}
.article-tag{font-size:11px;font-weight:600;letter-spacing:0.88px;text-transform:uppercase;color:var(--color-muted);margin-bottom:12px}
.article-card-body h3{font-size:18px;font-weight:600;color:var(--color-ink);margin-bottom:10px;line-height:1.4}
.article-card-body p{font-size:14px;color:var(--color-body);line-height:1.5;flex:1}
.article-read-more{display:inline-block;margin-top:16px;font-size:14px;font-weight:500;color:var(--color-primary)}

.facts-band{background:var(--color-surface-card);border-top:1px solid var(--color-hairline);border-bottom:1px solid var(--color-hairline)}
.facts-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.fact-item{padding:40px 32px;border-right:1px solid var(--color-hairline)}
.fact-item:last-child{border-right:none}
.fact-num{font-size:36px;font-weight:400;letter-spacing:-0.04em;color:var(--color-ink);margin-bottom:8px}
.fact-label{font-size:13px;color:var(--color-muted);line-height:1.4}

.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.intro-img{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--color-hairline)}
.intro-img img{width:100%;height:360px;object-fit:cover}
.intro-text h2{font-size:clamp(22px,2.5vw,30px);font-weight:400;letter-spacing:-0.02em;color:var(--color-ink);margin-bottom:16px}
.intro-text p{font-size:16px;color:var(--color-body);line-height:1.6;margin-bottom:16px}

.contact-section{background:var(--color-surface-card);border-top:1px solid var(--color-hairline);border-bottom:1px solid var(--color-hairline)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px}
.contact-info h2{font-size:clamp(22px,2.5vw,30px);font-weight:400;letter-spacing:-0.02em;color:var(--color-ink);margin-bottom:16px}
.contact-info p{font-size:16px;color:var(--color-body);line-height:1.6;margin-bottom:24px}
.contact-detail{display:flex;flex-direction:column;gap:12px}
.contact-detail-item{font-size:14px;color:var(--color-body)}
.contact-detail-item strong{color:var(--color-ink);display:block;margin-bottom:2px}

.contact-form{display:flex;flex-direction:column;gap:16px}
.form-group{display:flex;flex-direction:column;gap:6px}
.form-group label{font-size:13px;font-weight:600;color:var(--color-ink);letter-spacing:0.02em}
.form-group input,.form-group textarea{background:var(--color-canvas);color:var(--color-ink);border:1px solid var(--color-hairline-strong);border-radius:var(--radius-md);padding:12px 16px;font-size:16px;font-family:var(--font-sans);height:44px;outline:none;transition:border-color 0.15s}
.form-group textarea{height:120px;resize:vertical}
.form-group input:focus,.form-group textarea:focus{border-color:var(--color-ink)}
.form-group input::placeholder,.form-group textarea::placeholder{color:var(--color-muted-soft)}

.btn-primary{background:var(--color-primary);color:var(--color-on-primary);border:none;border-radius:var(--radius-md);padding:10px 18px;height:40px;font-size:14px;font-weight:500;cursor:pointer;font-family:var(--font-sans);transition:background 0.15s;display:inline-flex;align-items:center;gap:8px}
.btn-primary:hover{background:var(--color-primary-active)}
.btn-secondary{background:var(--color-surface-card);color:var(--color-ink);border:1px solid var(--color-hairline-strong);border-radius:var(--radius-md);padding:10px 18px;height:40px;font-size:14px;font-weight:500;cursor:pointer;font-family:var(--font-sans);transition:border-color 0.15s}
.btn-secondary:hover{border-color:var(--color-ink)}
.form-submit-btn{height:44px;width:100%;justify-content:center;font-size:15px}

.form-message{padding:12px 16px;border-radius:var(--radius-md);font-size:14px;display:none}
.form-message.success{background:#e8f5f0;color:var(--color-success);border:1px solid #b8ddd0;display:block}
.form-message.loading{background:var(--color-surface-strong);color:var(--color-muted);border:1px solid var(--color-hairline);display:block}

.site-footer{background:var(--color-canvas);border-top:1px solid var(--color-hairline);padding:64px 0 48px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
.footer-wordmark{font-size:16px;font-weight:600;color:var(--color-ink);display:block;margin-bottom:12px}
.footer-brand p{font-size:14px;color:var(--color-body);line-height:1.6;max-width:280px}
.footer-col h4{font-size:13px;font-weight:600;color:var(--color-ink);margin-bottom:16px;letter-spacing:0.02em}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-col ul li a{font-size:14px;color:var(--color-body)}
.footer-col ul li a:hover{color:var(--color-ink)}
.footer-bottom{border-top:1px solid var(--color-hairline);padding-top:24px;display:flex;flex-direction:column;gap:8px}
.footer-disclaimer{font-size:13px;color:var(--color-muted);line-height:1.5}
.footer-copy{font-size:13px;color:var(--color-muted)}
.footer-copy a{color:var(--color-muted)}
.footer-copy a:hover{color:var(--color-ink)}

.article-hero{padding:64px 0 48px;border-bottom:1px solid var(--color-hairline)}
.article-meta{display:flex;align-items:center;gap:16px;margin-bottom:24px}
.article-category{font-size:11px;font-weight:600;letter-spacing:0.88px;text-transform:uppercase;background:var(--color-surface-strong);color:var(--color-ink);padding:4px 10px;border-radius:var(--radius-pill)}
.article-date{font-size:13px;color:var(--color-muted)}
.article-hero h1{font-size:clamp(28px,4vw,48px);font-weight:400;letter-spacing:-0.025em;color:var(--color-ink);line-height:1.15;max-width:760px;margin-bottom:20px}
.article-hero-sub{font-size:18px;color:var(--color-body);max-width:640px;line-height:1.6}
.article-cover{margin-top:40px;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--color-hairline)}
.article-cover img{width:100%;height:400px;object-fit:cover}

.article-layout{display:grid;grid-template-columns:1fr 300px;gap:64px;padding:64px 0}
.article-content h2{font-size:clamp(20px,2.5vw,26px);font-weight:400;letter-spacing:-0.02em;color:var(--color-ink);margin:40px 0 16px}
.article-content h3{font-size:18px;font-weight:600;color:var(--color-ink);margin:28px 0 12px}
.article-content p{font-size:16px;color:var(--color-body);line-height:1.7;margin-bottom:20px}
.article-content ul,.article-content ol{padding-left:24px;margin-bottom:20px}
.article-content li{font-size:16px;color:var(--color-body);line-height:1.7;margin-bottom:8px}
.article-content a{color:var(--color-ink);text-decoration:underline;text-underline-offset:3px}
.article-content a:hover{color:var(--color-primary)}

.data-table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14px}
.data-table th{background:var(--color-surface-strong);color:var(--color-ink);font-weight:600;padding:12px 16px;text-align:left;border-bottom:1px solid var(--color-hairline-strong)}
.data-table td{padding:12px 16px;border-bottom:1px solid var(--color-hairline);color:var(--color-body)}
.data-table tr:last-child td{border-bottom:none}
.data-table tr:hover td{background:var(--color-canvas-soft)}

.info-box{background:var(--color-surface-card);border:1px solid var(--color-hairline);border-left:3px solid var(--color-ink);border-radius:var(--radius-md);padding:20px 24px;margin:24px 0}
.info-box-title{font-size:13px;font-weight:600;color:var(--color-ink);text-transform:uppercase;letter-spacing:0.06em;margin-bottom:10px}
.info-box p{font-size:14px;color:var(--color-body);line-height:1.6;margin:0}

.code-block{background:var(--color-surface-card);border:1px solid var(--color-hairline);border-radius:var(--radius-lg);padding:20px;margin:24px 0;font-family:var(--font-mono);font-size:13px;color:var(--color-ink);line-height:1.5;overflow-x:auto}

.article-sidebar{position:sticky;top:88px;height:fit-content}
.sidebar-card{background:var(--color-surface-card);border:1px solid var(--color-hairline);border-radius:var(--radius-lg);padding:24px;margin-bottom:24px}
.sidebar-card h4{font-size:13px;font-weight:600;color:var(--color-ink);letter-spacing:0.02em;margin-bottom:16px;text-transform:uppercase}
.sidebar-links{list-style:none;display:flex;flex-direction:column;gap:12px}
.sidebar-links li a{font-size:14px;color:var(--color-body);line-height:1.4}
.sidebar-links li a:hover{color:var(--color-ink)}
.sidebar-ref{font-size:13px;color:var(--color-muted);margin-bottom:10px;line-height:1.5}

.page-header{padding:64px 0 48px;border-bottom:1px solid var(--color-hairline)}
.page-header h1{font-size:clamp(28px,4vw,48px);font-weight:400;letter-spacing:-0.025em;color:var(--color-ink);margin-bottom:16px}
.page-header p{font-size:18px;color:var(--color-body);max-width:600px;line-height:1.6}
.page-content{padding:64px 0;max-width:760px}
.page-content h2{font-size:22px;font-weight:400;letter-spacing:-0.02em;color:var(--color-ink);margin:40px 0 14px}
.page-content h3{font-size:18px;font-weight:600;color:var(--color-ink);margin:24px 0 10px}
.page-content p{font-size:16px;color:var(--color-body);line-height:1.7;margin-bottom:16px}
.page-content ul,.page-content ol{padding-left:24px;margin-bottom:16px}
.page-content li{font-size:16px;color:var(--color-body);line-height:1.7;margin-bottom:6px}
.page-updated{font-size:13px;color:var(--color-muted);margin-top:48px;padding-top:24px;border-top:1px solid var(--color-hairline)}

.cookie-banner{position:fixed;bottom:0;left:0;right:0;background:var(--color-ink);color:var(--color-canvas);padding:16px 24px;z-index:1000}
.cookie-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.cookie-inner p{font-size:14px;flex:1;min-width:280px;line-height:1.5}
.cookie-inner a{color:var(--color-canvas);text-decoration:underline}
.cookie-actions{display:flex;gap:12px;flex-shrink:0}

@media(max-width:1024px){
.articles-grid{grid-template-columns:repeat(2,1fr)}
.facts-grid{grid-template-columns:repeat(2,1fr)}
.fact-item{border-bottom:1px solid var(--color-hairline)}
.fact-item:nth-child(2){border-right:none}
.intro-grid{grid-template-columns:1fr;gap:40px}
.contact-grid{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr 1fr;gap:32px}
.article-layout{grid-template-columns:1fr;gap:40px}
.article-sidebar{position:static}
}

@media(max-width:768px){
.nav-menu{display:none;position:absolute;top:64px;left:0;right:0;background:var(--color-canvas);border-bottom:1px solid var(--color-hairline);flex-direction:column;padding:16px 24px;gap:0}
.nav-menu.open{display:flex}
.nav-menu li a{display:block;padding:12px 0;border-bottom:1px solid var(--color-hairline-soft);font-size:15px}
.nav-toggle{display:flex}
.site-header{position:relative}
.hero-image img{height:240px}
.article-cover img{height:240px}
}

@media(max-width:640px){
.articles-grid{grid-template-columns:1fr}
.facts-grid{grid-template-columns:1fr 1fr}
.footer-grid{grid-template-columns:1fr}
.cookie-inner{flex-direction:column;align-items:flex-start}
}