*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --color-text:#1a1a1a;
  --color-text-muted:#5c5c5c;
  --color-border:#e5e5e5;
  --color-bg:#ffffff;
  --color-bg-alt:#f7f7f7;
  --color-accent:#111111;
  --color-link:#0066cc;
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  --max-width:1100px;
  --radius:6px;
  --shadow:0 1px 3px rgba(0,0,0,.06);
}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:var(--font);color:var(--color-text);background:var(--color-bg);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--color-link);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}
.container{max-width:var(--max-width);margin:0 auto;padding:0 20px}

/* Header */
.site-header{border-bottom:1px solid var(--color-border);background:#fff;position:sticky;top:0;z-index:100}
.header-inner{display:flex;align-items:center;gap:24px;padding:14px 20px;max-width:var(--max-width);margin:0 auto}
.logo{height:36px;width:auto}
.logo-link{flex-shrink:0}
.main-nav{display:flex;gap:20px;margin-left:auto}
.main-nav a{color:var(--color-text);font-size:.9rem;font-weight:500;text-decoration:none}
.main-nav a:hover{color:var(--color-link)}
.header-actions{display:flex;align-items:center;gap:16px}
.search-form{display:flex;border:1px solid var(--color-border);border-radius:var(--radius);overflow:hidden;background:#fff}
.search-form input{border:none;padding:8px 12px;font-size:.875rem;width:180px;outline:none;font-family:inherit}
.search-form button{border:none;background:transparent;padding:8px 10px;cursor:pointer;color:var(--color-text-muted);display:flex}
.lang-switch{position:relative;flex-shrink:0;font-size:.8rem;font-weight:600}
.lang-switch-btn{background:#fff;border:1px solid var(--color-border);border-radius:8px;padding:6px 10px;font:inherit;cursor:pointer;color:var(--color-text);list-style:none;user-select:none}
.lang-switch-btn::-webkit-details-marker{display:none}
.lang-switch-btn::marker{content:''}
.lang-switch-panel{display:none;position:absolute;right:0;top:calc(100% + 6px);min-width:220px;max-height:min(360px,70vh);overflow-y:auto;overflow-x:hidden;background:#fff;border:1px solid var(--color-border);border-radius:10px;box-shadow:0 8px 24px rgba(0,0,0,.12);z-index:200;padding:6px 0}
.lang-switch[open] .lang-switch-panel{display:block}
.lang-switch-panel a{display:block;padding:8px 14px;color:var(--color-text-muted);text-decoration:none;white-space:nowrap;font-weight:500}
.lang-switch-panel a:hover,.lang-switch-panel a.active{color:var(--color-text);background:#f7f7f8}
html[dir=rtl] .lang-switch-panel{right:auto;left:0}
html[dir=rtl] .lang-switch-panel a{text-align:right}
.mobile-menu-btn{display:none;background:none;border:none;cursor:pointer;padding:8px}
.mobile-menu-btn span{display:block;width:22px;height:2px;background:var(--color-text);margin:5px 0}

/* Hero */
.hero{background:var(--color-bg-alt);border-bottom:1px solid var(--color-border);padding:48px 0 56px}
.hero-label{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--color-text-muted);margin-bottom:12px}
.hero h1{font-size:clamp(1.75rem,4vw,2.25rem);font-weight:700;line-height:1.25;margin-bottom:12px;max-width:640px}
.hero-desc{color:var(--color-text-muted);max-width:560px;margin-bottom:24px;font-size:1.05rem}
.hero-search{display:flex;max-width:520px;border:1px solid var(--color-border);border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:var(--shadow)}
.hero-search input{flex:1;border:none;padding:14px 16px;font-size:1rem;outline:none;font-family:inherit}
.hero-search button{border:none;background:var(--color-accent);color:#fff;padding:14px 24px;font-weight:600;cursor:pointer;font-family:inherit;font-size:.9rem}

/* Sections */
.section{padding:48px 0}
.section-alt{background:var(--color-bg-alt);border-top:1px solid var(--color-border);border-bottom:1px solid var(--color-border)}
.section-title{font-size:1.25rem;font-weight:700;margin-bottom:24px;padding-bottom:8px;border-bottom:2px solid var(--color-accent);display:inline-block}
.section-link{margin-top:20px}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:40px}

/* Categories */
.category-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.category-card{display:block;padding:24px;border:1px solid var(--color-border);border-radius:var(--radius);background:#fff;text-decoration:none;color:inherit;transition:border-color .15s,box-shadow .15s}
.category-card:hover{border-color:#ccc;box-shadow:var(--shadow);text-decoration:none}
.cat-icon{font-size:1.5rem;display:block;margin-bottom:8px}
.category-card h3{font-size:1rem;font-weight:600;margin-bottom:6px}
.category-card p{font-size:.875rem;color:var(--color-text-muted);line-height:1.5}
.cat-count{display:inline-block;margin-top:12px;font-size:.75rem;font-weight:600;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.04em}

/* Articles */
.article-list{display:flex;flex-direction:column;gap:0}
.article-row{display:block;padding:20px 0;border-bottom:1px solid var(--color-border);text-decoration:none;color:inherit}
.article-row:hover{background:var(--color-bg-alt);margin:0 -12px;padding-left:12px;padding-right:12px;text-decoration:none}
.article-row h2,.article-row h3{font-size:1rem;font-weight:600;margin-bottom:4px;color:var(--color-text)}
.article-row p{font-size:.875rem;color:var(--color-text-muted);line-height:1.5}
.link-list{list-style:none}
.link-list li{border-bottom:1px solid var(--color-border)}
.link-list a{display:block;padding:10px 0;color:var(--color-text);font-size:.9rem;text-decoration:none}
.link-list a:hover{color:var(--color-link)}
.empty-state{color:var(--color-text-muted);font-size:.95rem;padding:12px 0}

/* DSP logos */
.dsp-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:12px}
.dsp-card{display:block;padding:16px 12px;border:1px solid var(--color-border);border-radius:var(--radius);background:#fff;text-align:center;display:flex;flex-direction:column;align-items:center;gap:8px;min-height:100px;justify-content:center;transition:box-shadow .15s,border-color .15s;text-decoration:none;color:inherit}
.dsp-card:hover{border-color:#ccc;box-shadow:var(--shadow)}
.dsp-logo-wrap{display:flex;align-items:center;justify-content:center;width:56px;height:56px;flex-shrink:0}
.dsp-logo-wrap-lg{width:64px;height:64px}
.dsp-logo{width:100%;height:100%;object-fit:contain;display:block}
.dsp-card h3{font-size:.8rem;font-weight:600;line-height:1.3;color:var(--color-text)}
.dsp-card p{display:none}
.dsp-detail-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.dsp-detail-card{padding:24px;border:1px solid var(--color-border);border-radius:var(--radius);background:#fff}
.dsp-detail-head{display:flex;align-items:center;gap:14px;margin-bottom:12px}
.dsp-detail-head h2{font-size:1.1rem;font-weight:600}
.dsp-detail-card p{font-size:.9rem;color:var(--color-text-muted);margin-bottom:14px;line-height:1.6}
.dsp-links{display:flex;gap:16px;font-size:.85rem;font-weight:500}
.dsp-marquee{overflow:hidden;border-top:1px solid var(--color-border);border-bottom:1px solid var(--color-border);background:#fff;padding:20px 0}
.dsp-marquee-track{display:flex;gap:32px;align-items:center;animation:dsp-scroll 40s linear infinite;width:max-content}
.dsp-marquee-item{flex-shrink:0;width:48px;height:48px;display:flex;align-items:center;justify-content:center}
.dsp-marquee-item img{width:100%;height:100%;object-fit:contain;opacity:.85}
@keyframes dsp-scroll{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}

/* Article page */
.breadcrumb-bar{padding:16px 0 0}
.breadcrumb{font-size:.8rem;color:var(--color-text-muted)}
.breadcrumb a{color:var(--color-text-muted);text-decoration:none}
.breadcrumb span{margin:0 6px}
.page-content{padding:32px 0 64px}
.page-header{margin-bottom:32px}
.page-header h1{font-size:clamp(1.5rem,3vw,2rem);font-weight:700;line-height:1.3;margin-bottom:8px}
.lead{font-size:1.05rem;color:var(--color-text-muted);max-width:640px}
.article-page{padding-bottom:64px}
.article-header{margin-bottom:32px;padding-bottom:24px;border-bottom:1px solid var(--color-border)}
.article-cat{font-size:.8rem;margin-bottom:8px}
.article-cat a{color:var(--color-text-muted);text-decoration:none;font-weight:500}
.article-header h1{font-size:clamp(1.5rem,3vw,2rem);font-weight:700;line-height:1.3;margin-bottom:12px}
.article-excerpt{font-size:1.05rem;color:var(--color-text-muted);margin-bottom:16px}
.article-meta{display:flex;gap:20px;font-size:.8rem;color:var(--color-text-muted)}
.article-cat-inline{font-size:.75rem;color:var(--color-text-muted);margin-bottom:4px;text-transform:uppercase;letter-spacing:.04em;font-weight:600}

/* Prose */
.prose{font-size:1rem;line-height:1.75;color:var(--color-text);max-width:720px}
.prose h2{font-size:1.25rem;font-weight:700;margin:32px 0 12px;padding-top:8px}
.prose h3{font-size:1.05rem;font-weight:600;margin:24px 0 8px}
.prose p{margin-bottom:16px}
.prose ul,.prose ol{margin:0 0 16px 24px}
.prose li{margin-bottom:6px}
.prose strong{font-weight:600}
.prose table{width:100%;border-collapse:collapse;margin:16px 0;font-size:.9rem}
.prose th,.prose td{border:1px solid var(--color-border);padding:10px 12px;text-align:left}
.prose th{background:var(--color-bg-alt);font-weight:600}
.prose blockquote{border-left:3px solid var(--color-border);padding:12px 16px;margin:16px 0;color:var(--color-text-muted);background:var(--color-bg-alt)}
.prose code{background:var(--color-bg-alt);padding:2px 6px;border-radius:3px;font-size:.875em}
.related-articles{margin-top:48px;padding-top:32px;border-top:1px solid var(--color-border)}
.related-articles h2{font-size:1rem;font-weight:700;margin-bottom:12px}
.article-cta{margin-top:48px;padding:24px;background:var(--color-bg-alt);border:1px solid var(--color-border);border-radius:var(--radius);text-align:center}
.article-cta p{margin-bottom:16px;color:var(--color-text-muted)}
.btn-primary{display:inline-block;background:var(--color-accent);color:#fff;padding:12px 24px;border-radius:var(--radius);font-weight:600;font-size:.9rem;text-decoration:none}
.btn-primary:hover{opacity:.9;text-decoration:none;color:#fff}

/* Footer */
.site-footer{border-top:1px solid var(--color-border);background:var(--color-bg-alt);padding:48px 0 0;margin-top:48px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;padding-bottom:32px}
.footer-brand p{font-size:.875rem;color:var(--color-text-muted);margin-top:12px;max-width:280px}
.footer-links h4{font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;margin-bottom:12px}
.footer-links ul{list-style:none}
.footer-links li{margin-bottom:8px}
.footer-links a{font-size:.875rem;color:var(--color-text-muted);text-decoration:none}
.footer-links a:hover{color:var(--color-link)}
.footer-bottom{padding:20px 0;border-top:1px solid var(--color-border);font-size:.8rem;color:var(--color-text-muted)}

/* 404 */
.error-page{text-align:center;padding:80px 20px}
.error-page h1{font-size:4rem;font-weight:700;color:var(--color-border)}
.error-page h2{margin:16px 0 8px}
.error-page p{color:var(--color-text-muted);margin-bottom:24px}
.empty-state{padding:40px 0;color:var(--color-text-muted)}

/* Mobile */
@media(max-width:768px){
  .main-nav,.header-actions .search-form{display:none}
  .mobile-menu-btn{display:block;margin-left:auto}
  .header-inner.open .main-nav{display:flex;flex-direction:column;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--color-border);padding:16px 20px}
  .header-inner.open .header-actions{display:flex;flex-direction:column;width:100%;padding:0 20px 16px;background:#fff}
  .header-inner.open .search-form{display:flex;width:100%}
  .header-inner.open .search-form input{width:100%}
  .header-inner.open .lang-switch{width:100%}
  .header-inner.open .lang-switch-panel{position:static;max-height:240px;width:100%;margin-top:8px;box-shadow:none}
  .header-inner{flex-wrap:wrap;position:relative}
  .two-col{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .hero{padding:32px 0 40px}
}