*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#0d0d0d;--surface:#171717;--surface-hover:#2a2a2a;--border:#3f3f3f;--text:#ececec;--text-secondary:#8b8b8b;--accent:#10a37f;--accent-hover:#1a7f64;--radius:12px;--shadow:0 4px 24px rgba(0,0,0,0.4);--font:'Söhne',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}
[data-theme=light]{--bg:#ffffff;--surface:#f7f7f8;--surface-hover:#ececec;--border:#e5e5e5;--text:#1a1a1a;--text-secondary:#6e6e73;--accent:#10a37f;--accent-hover:#0d8a6e;--shadow:0 4px 24px rgba(0,0,0,0.08)}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;transition:background 0.3s,color 0.3s}
a{color:var(--accent);text-decoration:none;transition:color 0.2s}
a:hover{color:var(--accent-hover)}
img{max-width:100%;height:auto;display:block}
.container{max-width:1024px;margin:0 auto;padding:0 20px}
header{position:fixed;top:0;left:0;right:0;height:60px;background:var(--surface);border-bottom:1px solid var(--border);z-index:100;backdrop-filter:blur(12px)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%}
.logo{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:700;color:var(--text)}
.logo svg{width:32px;height:32px}
.nav{display:flex;align-items:center;gap:24px}
.nav a{color:var(--text-secondary);font-size:0.9rem;font-weight:500;transition:color 0.2s}
.nav a:hover,.nav a.active{color:var(--text)}
.theme-toggle{background:none;border:none;cursor:pointer;padding:8px;border-radius:8px;color:var(--text-secondary);transition:background 0.2s}
.theme-toggle:hover{background:var(--surface-hover)}
.mobile-menu-btn{display:none;background:none;border:none;cursor:pointer;padding:8px;color:var(--text)}
main{padding-top:80px;min-height:100vh}
.hero{padding:60px 0;text-align:center}
.hero h1{font-size:clamp(2rem,5vw,3rem);font-weight:700;margin-bottom:16px;background:linear-gradient(135deg,var(--text) 0%,var(--accent) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:1.125rem;color:var(--text-secondary);max-width:600px;margin:0 auto 32px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius);font-size:1rem;font-weight:600;cursor:pointer;transition:background 0.2s,transform 0.2s}
.btn:hover{background:var(--accent-hover);transform:translateY(-2px)}
.btn-outline{background:transparent;border:2px solid var(--border);color:var(--text)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent)}
.chat-container{max-width:800px;margin:0 auto;background:var(--surface);border-radius:16px;border:1px solid var(--border);overflow:hidden;box-shadow:var(--shadow)}
.chat-messages{padding:20px;max-height:400px;overflow-y:auto;display:flex;flex-direction:column;gap:16px}
.chat-message{display:flex;gap:12px;align-items:flex-start}
.chat-message.user{flex-direction:row-reverse}
.avatar{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:0.75rem;font-weight:700}
.avatar.bot{background:var(--accent);color:#fff}
.avatar.user{background:var(--surface-hover);color:var(--text)}
.message-content{background:var(--surface-hover);padding:12px 16px;border-radius:12px;max-width:80%;font-size:0.95rem;line-height:1.5}
.chat-message.user .message-content{background:var(--accent);color:#fff}
.typing-indicator{display:flex;gap:4px;padding:12px 16px;background:var(--surface-hover);border-radius:12px}
.typing-indicator span{width:8px;height:8px;background:var(--text-secondary);border-radius:50%;animation:typing 1.4s infinite}
.typing-indicator span:nth-child(2){animation-delay:0.2s}
.typing-indicator span:nth-child(3){animation-delay:0.4s}
@keyframes typing{0%,60%,100%{transform:translateY(0);opacity:0.4}30%{transform:translateY(-4px);opacity:1}}
.chat-input-area{display:flex;gap:12px;padding:16px;border-top:1px solid var(--border)}
.chat-input{flex:1;padding:12px 16px;background:var(--bg);border:1px solid var(--border);border-radius:24px;color:var(--text);font-size:0.95rem;outline:none;transition:border-color 0.2s}
.chat-input:focus{border-color:var(--accent)}
.chat-input::placeholder{color:var(--text-secondary)}
.send-btn{width:44px;height:44px;background:var(--accent);border:none;border-radius:50%;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background 0.2s}
.send-btn:hover{background:var(--accent-hover)}
.send-btn:disabled{background:var(--border);cursor:not-allowed}
.chat-actions{display:flex;justify-content:space-between;padding:12px 16px;border-top:1px solid var(--border)}
.chat-actions button{background:none;border:none;color:var(--text-secondary);font-size:0.85rem;cursor:pointer;display:flex;align-items:center;gap:6px;padding:6px 12px;border-radius:6px;transition:background 0.2s}
.chat-actions button:hover{background:var(--surface-hover);color:var(--text)}
.section{padding:60px 0}
.section-title{font-size:1.75rem;font-weight:700;margin-bottom:8px}
.section-subtitle{color:var(--text-secondary);margin-bottom:40px}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.feature-card{background:var(--surface);padding:24px;border-radius:var(--radius);border:1px solid var(--border);transition:transform 0.2s,box-shadow 0.2s}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.feature-icon{width:48px;height:48px;background:var(--accent);border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:16px;color:#fff;font-size:1.5rem}
.feature-card h3{font-size:1.125rem;margin-bottom:8px}
.feature-card p{color:var(--text-secondary);font-size:0.9rem}
.seo-content{max-width:800px;margin:0 auto}
.seo-content h2{margin:40px 0 16px;font-size:1.5rem}
.seo-content p{color:var(--text-secondary);margin-bottom:16px}
.seo-content ul{margin:16px 0;padding-left:24px}
.seo-content li{color:var(--text-secondary);margin-bottom:8px}
.blog-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px;margin-top:40px}
.blog-card{background:var(--surface);border-radius:var(--radius);border:1px solid var(--border);overflow:hidden;transition:transform 0.2s,box-shadow 0.2s}
.blog-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.blog-card-image{aspect-ratio:16/9;background:var(--surface-hover);overflow:hidden}
.blog-card-image img{width:100%;height:100%;object-fit:cover;transition:transform 0.3s}
.blog-card:hover .blog-card-image img{transform:scale(1.05)}
.blog-card-content{padding:20px}
.blog-card-category{font-size:0.75rem;font-weight:600;color:var(--accent);text-transform:uppercase;letter-spacing:0.5px;margin-bottom:8px}
.blog-card h3{font-size:1.125rem;margin-bottom:8px;line-height:1.4}
.blog-card p{color:var(--text-secondary);font-size:0.9rem;margin-bottom:12px}
.blog-card-meta{font-size:0.8rem;color:var(--text-secondary);display:flex;gap:16px}
.page-header{padding:60px 0 40px;text-align:center}
.page-header h1{font-size:2.5rem;margin-bottom:12px}
.page-header p{color:var(--text-secondary);font-size:1.125rem;max-width:600px;margin:0 auto}
.breadcrumb{font-size:0.85rem;color:var(--text-secondary);margin-bottom:16px;display:flex;gap:8px;flex-wrap:wrap}
.breadcrumb a{color:var(--text-secondary)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb span{color:var(--text)}
.blog-layout{display:grid;grid-template-columns:1fr 300px;gap:40px;padding:40px 0}
.blog-main{min-width:0}
.sidebar{position:sticky;top:80px;height:fit-content}
.sidebar-widget{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:24px}
.sidebar-widget h3{font-size:1rem;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--border)}
.search-input{width:100%;padding:10px 14px;background:var(--bg);border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:0.9rem;outline:none}
.search-input:focus{border-color:var(--accent)}
.category-list{list-style:none}
.category-list li{margin-bottom:8px}
.category-list a{color:var(--text-secondary);font-size:0.9rem;display:flex;justify-content:space-between;padding:8px 0;transition:color 0.2s}
.category-list a:hover{color:var(--text)}
.category-list span{background:var(--surface-hover);padding:2px 8px;border-radius:4px;font-size:0.8rem}
.recent-posts{list-style:none}
.recent-posts li{padding:12px 0;border-bottom:1px solid var(--border)}
.recent-posts li:last-child{border:none}
.recent-posts a{color:var(--text);font-size:0.9rem;line-height:1.4}
.recent-posts a:hover{color:var(--accent)}
.recent-posts time{font-size:0.75rem;color:var(--text-secondary);display:block;margin-top:4px}
.article-content{max-width:720px;margin:0 auto;padding:40px 0}
.article-header{margin-bottom:32px}
.article-meta{color:var(--text-secondary);font-size:0.9rem;display:flex;gap:16px;flex-wrap:wrap;margin-top:12px}
.article-content h2{margin:40px 0 16px;font-size:1.5rem}
.article-content h3{margin:32px 0 12px;font-size:1.25rem}
.article-content p{color:var(--text-secondary);margin-bottom:16px;line-height:1.8}
.article-content ul,.article-content ol{margin:16px 0;padding-left:24px;color:var(--text-secondary)}
.article-content li{margin-bottom:8px;line-height:1.7}
.article-content blockquote{border-left:4px solid var(--accent);padding-left:20px;margin:24px 0;color:var(--text-secondary);font-style:italic}
.faq-section{margin-top:48px;padding-top:32px;border-top:1px solid var(--border)}
.faq-section h2{margin-bottom:24px}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:12px;margin-bottom:12px;overflow:hidden}
.faq-question{padding:16px 20px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background 0.2s}
.faq-question:hover{background:var(--surface-hover)}
.faq-question::after{content:'+';font-size:1.25rem;color:var(--text-secondary);transition:transform 0.2s}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 20px;max-height:0;overflow:hidden;transition:max-height 0.3s,padding 0.3s}
.faq-item.active .faq-answer{padding:0 20px 16px;max-height:200px}
.faq-answer p{color:var(--text-secondary);font-size:0.95rem}
.related-articles{margin-top:48px}
.related-articles h2{margin-bottom:24px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px}
.contact-form{max-width:600px;margin:0 auto;background:var(--surface);padding:32px;border-radius:var(--radius);border:1px solid var(--border)}
.form-group{margin-bottom:20px}
.form-group label{display:block;margin-bottom:8px;font-weight:500}
.form-group input,.form-group textarea{width:100%;padding:12px 16px;background:var(--bg);border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:1rem;outline:none;transition:border-color 0.2s;font-family:var(--font)}
.form-group input:focus,.form-group textarea:focus{border-color:var(--accent)}
.form-group textarea{resize:vertical;min-height:150px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px}
footer{background:var(--surface);border-top:1px solid var(--border);padding:40px 0 20px;margin-top:60px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:40px;margin-bottom:32px}
footer h4{font-size:1rem;margin-bottom:16px}
footer ul{list-style:none}
footer li{margin-bottom:8px}
footer a{color:var(--text-secondary);font-size:0.9rem}
footer a:hover{color:var(--text)}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid var(--border);color:var(--text-secondary);font-size:0.85rem}
.adsense-ad{background:var(--surface);border-radius:8px;margin:20px auto;display:flex;justify-content:center;align-items:center;min-height:90px}
.adsense-ad.leaderboard{min-height:90px}
.adsense-ad.rectangle{min-height:250px}
.ads-placeholder{color:var(--text-secondary);font-size:0.8rem;text-align:center;padding:20px;border:2px dashed var(--border);border-radius:8px}
.privacy-content{max-width:800px;margin:0 auto;padding:40px 0}
.privacy-content h2{margin:32px 0 16px;font-size:1.5rem}
.privacy-content p{color:var(--text-secondary);margin-bottom:16px}
.privacy-content ul{color:var(--text-secondary);margin-left:24px;margin-bottom:16px}
table{width:100%;border-collapse:collapse;margin:24px 0}
table th,table td{padding:12px;border:1px solid var(--border);text-align:left}
table th{background:var(--surface)}
@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.fade-in{animation:fadeIn 0.5s ease-out}
@media(max-width:1024px){.blog-layout{grid-template-columns:1fr}.sidebar{display:none}
}
@media(max-width:768px){.nav{display:none;position:absolute;top:60px;left:0;right:0;background:var(--surface);flex-direction:column;padding:20px;gap:16px;border-bottom:1px solid var(--border)}
.nav.active{display:flex}
.mobile-menu-btn{display:block}
.hero{padding:40px 0}
.section{padding:40px 0}
.chat-container{border-radius:12px;margin:0 12px}
.blog-grid{grid-template-columns:1fr}
.form-row{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr;text-align:center}
}
@media(max-width:480px){.container{padding:0 16px}
.hero h1{font-size:1.75rem}
.page-header h1{font-size:1.75rem}
.chat-message .message-content{max-width:90%}
}