*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#6366f1;--primary-dark:#4f46e5;--accent:#f59e0b;--bg:#fafafa;--card:#fff;--text:#1e293b;--text2:#64748b;--border:#e2e8f0;--radius:16px}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.7}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto}

.navbar{background:rgba(255,255,255,0.85);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);padding:0 24px;height:64px;display:flex;align-items:center;position:sticky;top:0;z-index:100}
.nav-inner{max-width:1200px;margin:0 auto;width:100%;display:flex;align-items:center;justify-content:space-between}
.nav-logo{font-size:1.4rem;font-weight:800;color:var(--text)}
.nav-logo span{color:var(--accent);font-weight:600}
.nav-links{display:flex;gap:8px;align-items:center}
.nav-links a{padding:8px 16px;border-radius:10px;font-size:.92rem;font-weight:500;color:var(--text2);transition:all .2s}
.nav-links a:hover{background:var(--primary);color:#fff}
.hamburger{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text)}
@media(max-width:768px){.nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;padding:16px;box-shadow:0 10px 40px rgba(0,0,0,0.1);border-radius:0 0 16px 16px}.nav-links.open{display:flex}.hamburger{display:block}}

.hero{background:linear-gradient(135deg,#6366f1 0%,#8b5cf6 50%,#a78bfa 100%);padding:80px 24px;text-align:center;color:#fff}
.hero h1{font-size:2.8rem;font-weight:800;margin-bottom:16px;text-shadow:0 2px 10px rgba(0,0,0,0.15)}
.hero p{font-size:1.15rem;opacity:0.9;max-width:600px;margin:0 auto 32px}
.hero-search{max-width:500px;margin:0 auto}
.hero-search input{width:100%;padding:16px 24px;border-radius:14px;border:none;font-size:1rem;box-shadow:0 8px 30px rgba(0,0,0,0.15);outline:none}
.hero-search input:focus{box-shadow:0 8px 30px rgba(0,0,0,0.25)}

.section{padding:60px 24px;max-width:1200px;margin:0 auto}
.section-title{font-size:1.8rem;font-weight:800;text-align:center;margin-bottom:8px}
.section-sub{text-align:center;color:var(--text2);margin-bottom:40px;font-size:1.05rem}
.cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:all .3s;cursor:pointer;text-decoration:none;color:var(--text);display:block}
.card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(99,102,241,0.12);border-color:var(--primary)}
.card-icon{font-size:2rem;margin-bottom:12px}
.card h3{font-size:1.1rem;font-weight:700;margin-bottom:6px}
.card p{color:var(--text2);font-size:.9rem;line-height:1.5}

.tool-page{padding:40px 24px;max-width:800px;margin:0 auto}
.tool-page h1{font-size:2rem;font-weight:800;margin-bottom:12px}
.breadcrumb{font-size:.85rem;color:var(--text2);margin-bottom:24px}
.breadcrumb a{color:var(--primary)}
.desc{color:var(--text2);font-size:1.05rem;margin-bottom:32px;line-height:1.6}
.calc-box{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:32px;max-width:600px}
.calc-box label{display:block;font-weight:600;font-size:.9rem;margin-bottom:6px;margin-top:16px;color:var(--text)}
.calc-box label:first-child{margin-top:0}
.calc-box input,.calc-box select,.calc-box textarea{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:10px;font-size:1rem;outline:none;transition:border .2s}
.calc-box input:focus,.calc-box select:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(99,102,241,0.1)}
.calc-box button{margin-top:24px;background:var(--primary);color:#fff;border:none;padding:14px 32px;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s;width:100%}
.calc-box button:hover{background:var(--primary-dark);transform:translateY(-1px)}
.result-box{margin-top:20px;padding:0;border-radius:10px;font-size:1rem;transition:all .3s}
.result-box.show{padding:20px;background:linear-gradient(135deg,#eef2ff,#e0e7ff);border:1px solid #c7d2fe}
.result-box strong{color:var(--primary-dark);font-size:1.2rem}

.category-label{font-size:1.2rem;font-weight:700;margin:32px 0 16px;padding-left:12px;border-left:4px solid var(--accent)}

.static-page{padding:40px 24px;max-width:800px;margin:0 auto}
.static-page h1{font-size:2rem;font-weight:800;margin-bottom:24px}
.static-page h2{font-size:1.4rem;font-weight:700;margin:32px 0 12px;color:var(--primary-dark)}
.static-page p,.static-page li{color:var(--text2);line-height:1.8;margin-bottom:12px}
.static-page ul{padding-left:24px;margin-bottom:16px}

.article-page{padding:40px 24px;max-width:780px;margin:0 auto}
.article-page h1{font-size:2rem;font-weight:800;margin-bottom:12px;line-height:1.3}
.article-meta{color:var(--text2);font-size:.9rem;margin-bottom:24px;display:flex;gap:16px;flex-wrap:wrap}
.article-meta span{background:#f1f5f9;padding:4px 12px;border-radius:8px}
.article-page h2{font-size:1.5rem;font-weight:700;margin:36px 0 12px}
.article-page p{color:var(--text2);line-height:1.85;margin-bottom:16px;font-size:1.02rem}
.article-page a.tool-mention{color:var(--primary);font-weight:600;border-bottom:2px solid rgba(99,102,241,0.3);transition:border .2s}
.article-page a.tool-mention:hover{border-color:var(--primary)}
.article-page img{border-radius:var(--radius);margin:24px 0;box-shadow:0 4px 20px rgba(0,0,0,0.08)}

.contact-form{max-width:500px}
.contact-form label{display:block;font-weight:600;font-size:.9rem;margin-bottom:6px;margin-top:16px}
.contact-form input,.contact-form select,.contact-form textarea{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:10px;font-size:1rem;outline:none;font-family:inherit}
.contact-form input:focus,.contact-form textarea:focus{border-color:var(--primary)}
.contact-form button{margin-top:20px;background:var(--primary);color:#fff;border:none;padding:14px 32px;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s}
.contact-form button:hover{background:var(--primary-dark)}

.faq-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;overflow:hidden}
.faq-item h3{padding:16px 20px;cursor:pointer;font-size:1rem;display:flex;justify-content:space-between;align-items:center;background:#fff;transition:background .2s}
.faq-item h3:hover{background:#f8fafc}
.faq-item h3::after{content:'+';font-size:1.3rem;color:var(--primary);font-weight:700}
.faq-item.open h3::after{content:'\2212'}
.faq-item p{padding:0 20px;max-height:0;overflow:hidden;transition:all .3s;color:var(--text2);line-height:1.7}
.faq-item.open p{padding:0 20px 16px;max-height:300px}

.footer{background:var(--text);color:#94a3b8;padding:48px 24px 24px}
.footer-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px}
.footer h4{color:#fff;font-size:1rem;margin-bottom:12px}
.footer a{color:#94a3b8;display:block;font-size:.9rem;margin-bottom:8px;transition:color .2s}
.footer a:hover{color:var(--accent)}
.footer-bottom{text-align:center;margin-top:32px;padding-top:24px;border-top:1px solid #334155;font-size:.85rem}

@media(max-width:768px){
.hero h1{font-size:1.8rem}
.hero{padding:50px 20px}
.section{padding:40px 16px}
.cards-grid{grid-template-columns:1fr}
.tool-page,.static-page,.article-page{padding:24px 16px}
}