*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#1a56db;--primary-dark:#1e3a8a;--secondary:#10b981;--dark:#111827;--navy:#1e293b;--slate:#475569;--silver:#94a3b8;--light:#f1f5f9;--white:#fff;--amber:#f59e0b;--gray:#f8fafc;--border:#e2e8f0;--text:#1e293b;--success:#059669;--danger:#dc2626}
html{scroll-behavior:smooth}
body{font-family:'Inter',sans-serif;background:var(--white);color:var(--text);line-height:1.6}
h1,h2,h3,h4{font-family:'Plus Jakarta Sans',sans-serif;font-weight:700;line-height:1.2;color:var(--dark)}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-dark)}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.header{background:var(--white);position:sticky;top:0;z-index:1000;box-shadow:0 1px 3px rgba(0,0,0,0.08);border-bottom:2px solid var(--border)}
.header .container{display:flex;justify-content:space-between;align-items:center;padding:0 24px;height:68px}
.logo{font-family:'Plus Jakarta Sans',sans-serif;font-size:1.3rem;font-weight:800;color:var(--dark);display:flex;align-items:center;gap:8px;transition:color 0.3s}
.logo:hover{color:var(--primary)}
.logo i{color:var(--primary);font-size:1.4rem}
.logo span{color:var(--primary)}
.nav{position:relative}
.nav-menu{display:flex;list-style:none;gap:4px;align-items:center}
.nav-menu li a{font-size:0.85rem;font-weight:600;color:var(--slate);padding:8px 14px;border-radius:6px;transition:all 0.25s;letter-spacing:0.2px}
.nav-menu li a:hover{color:var(--primary);background:rgba(26,86,219,0.06)}
.nav-menu li a.active{color:var(--primary);background:rgba(26,86,219,0.08)}
.menu-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;background:rgba(26,86,219,0.08);border:none;cursor:pointer;padding:9px;border-radius:6px;transition:background 0.25s}
.menu-toggle:hover{background:rgba(26,86,219,0.14)}
.menu-toggle span{display:block;width:20px;height:2px;background:var(--primary);border-radius:1px;transition:all 0.25s}
.menu-toggle.active span:nth-child(1){transform:rotate(45deg) translate(4.5px,4.5px)}
.menu-toggle.active span:nth-child(2){opacity:0}
.menu-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(4.5px,-4.5px)}
@media(max-width:768px){
.menu-toggle{display:flex}
.nav-menu{display:none}
.nav-menu.active{position:fixed;top:68px;left:0;right:0;bottom:0;background:var(--white);flex-direction:column;padding:20px;gap:2px;display:flex;overflow-y:auto;box-shadow:0 8px 30px rgba(0,0,0,0.1)}
.nav-menu.active li{width:100%}
.nav-menu.active li a{display:block;padding:13px 16px;font-size:0.95rem;color:var(--slate);border-radius:6px}
.header .container{height:62px}
}
.hero{background:linear-gradient(135deg,rgba(30,58,138,0.92),rgba(17,24,39,0.88)),url('https://images.unsplash.com/photo-1460925895917-afdab827c52f?w=1400&q=80') center/cover no-repeat;padding:120px 0;text-align:center;min-height:560px;display:flex;align-items:center}
.hero h1{font-size:3rem;color:var(--white);margin-bottom:16px;letter-spacing:-0.5px}
.hero p{font-size:1.1rem;color:rgba(255,255,255,0.8);max-width:600px;margin:0 auto 28px;line-height:1.75}
.hero .badge{display:inline-block;background:rgba(16,185,129,0.2);color:#34d399;padding:6px 16px;border-radius:20px;font-size:0.82rem;font-weight:600;letter-spacing:0.5px;margin-bottom:14px;border:1px solid rgba(16,185,129,0.3)}
.btn-primary{display:inline-block;background:var(--primary);color:var(--white);padding:13px 32px;border-radius:8px;font-weight:700;transition:all 0.25s;border:none;cursor:pointer;font-size:0.92rem;letter-spacing:0.3px}
.btn-primary:hover{background:var(--primary-dark);color:var(--white);transform:translateY(-2px);box-shadow:0 6px 20px rgba(26,86,219,0.35)}
.btn-secondary{display:inline-block;background:transparent;color:var(--white);padding:13px 32px;border-radius:8px;font-weight:700;transition:all 0.25s;border:2px solid rgba(255,255,255,0.35);cursor:pointer;font-size:0.92rem}
.btn-secondary:hover{background:rgba(255,255,255,0.1);color:var(--white);border-color:rgba(255,255,255,0.6)}
.section{padding:80px 0}
.section h1{font-size:2.2rem;color:var(--dark);text-align:center;margin-bottom:10px}
.section-desc{text-align:center;color:var(--slate);max-width:560px;margin:0 auto 44px;font-size:0.97rem}
.tools-grid,.articles-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(275px,1fr));gap:22px}
.tool-card,.article-card{background:var(--white);border-radius:12px;overflow:hidden;transition:all 0.3s;border:1px solid var(--border);box-shadow:0 1px 3px rgba(0,0,0,0.04)}
.tool-card:hover,.article-card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(0,0,0,0.1);border-color:rgba(26,86,219,0.2)}
.tool-card a{display:block;padding:28px 24px;text-align:center}
.tool-card i{font-size:2.4rem;color:var(--primary);margin-bottom:12px;display:block}
.tool-card h3{font-size:1.02rem;color:var(--dark);margin-bottom:7px}
.tool-card p{font-size:0.83rem;color:var(--slate);line-height:1.5}
.article-card a{display:block;position:relative;overflow:hidden}
.article-card img{width:100%;height:205px;object-fit:cover;transition:transform 0.4s}
.article-card:hover img{transform:scale(1.04)}
.article-tag{position:absolute;top:12px;left:12px;background:var(--primary);color:var(--white);padding:4px 12px;border-radius:4px;font-size:0.7rem;font-weight:700;letter-spacing:0.4px;text-transform:uppercase}
.article-card h3{padding:16px 18px 5px;font-size:1.05rem;color:var(--dark);line-height:1.4}
.article-card p{padding:0 18px 18px;font-size:0.83rem;color:var(--slate);line-height:1.6}
.breadcrumb{padding:20px 0;font-size:0.82rem;color:#999}
.breadcrumb a{color:var(--primary)}
.tool-page{background:var(--white);border-radius:12px;padding:40px;max-width:720px;margin:0 auto;border:1px solid var(--border)}
.tool-page h1{font-size:1.9rem;color:var(--dark);margin-bottom:10px}
.tool-page h1 i{color:var(--primary);margin-right:8px}
.tool-desc{color:var(--slate);margin-bottom:26px;font-size:0.97rem;line-height:1.6}
.form-group{margin-bottom:18px}
.form-group label{display:block;font-weight:600;color:var(--dark);margin-bottom:6px;font-size:0.85rem}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:12px 14px;border:1.5px solid var(--border);border-radius:7px;font-size:0.95rem;font-family:inherit;background:var(--gray);transition:border-color 0.25s}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--primary)}
.result-box{background:var(--light);padding:24px;border-radius:10px;border:2px solid var(--primary);margin-top:20px}
.result-item{background:var(--white);padding:14px;border-radius:7px;text-align:center;margin-bottom:8px;border:1px solid var(--border)}
.result-item .result-label{font-size:0.78rem;color:var(--slate);margin-bottom:4px;text-transform:uppercase;letter-spacing:0.4px}
.result-item .result-value{font-size:1.5rem;font-weight:800;color:var(--primary)}
.article-page{background:var(--white);border-radius:12px;padding:42px;max-width:820px;margin:0 auto;border:1px solid var(--border)}
.article-header{margin-bottom:28px}
.article-header h1{font-size:2.2rem;color:var(--dark);margin-bottom:12px;line-height:1.3}
.article-meta{display:flex;gap:14px;font-size:0.82rem;color:#888;flex-wrap:wrap;margin-bottom:18px}
.article-img{width:100%;max-height:420px;object-fit:cover;border-radius:10px;margin:18px 0}
.article-content h2{font-size:1.55rem;color:var(--dark);margin:34px 0 12px}
.article-content h3{font-size:1.22rem;color:var(--dark);margin:26px 0 10px}
.article-content p{font-size:1rem;line-height:1.85;margin-bottom:13px;color:#374151}
.article-content a{color:var(--primary);font-weight:500}
.article-content a:hover{text-decoration:underline}
.related-articles{margin-top:40px;padding-top:24px;border-top:1px solid var(--border)}
.related-articles h3{font-size:1.2rem;color:var(--dark);margin-bottom:14px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:10px}
.related-card{background:var(--light);padding:16px;border-radius:7px;transition:all 0.25s;border:1px solid var(--border)}
.related-card:hover{background:var(--white);border-color:var(--primary)}
.related-card h4{color:var(--dark);margin-bottom:4px;font-size:0.95rem}
.related-card p{font-size:0.78rem;color:var(--slate)}
.footer{background:var(--dark);color:rgba(255,255,255,0.5);padding:50px 0 20px;margin-top:70px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;margin-bottom:32px}
.footer-col h4{font-size:1rem;margin-bottom:14px;color:var(--white);font-family:'Plus Jakarta Sans',sans-serif}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:9px}
.footer-col ul li a{color:rgba(255,255,255,0.5);font-size:0.88rem}
.footer-col ul li a:hover{color:var(--white)}
.footer-bottom{text-align:center;padding-top:18px;border-top:1px solid rgba(255,255,255,0.06);font-size:0.75rem;color:#555}
.contact-form{max-width:600px;margin:0 auto}
.contact-form input,.contact-form textarea,.contact-form select{width:100%;padding:13px;border:1.5px solid var(--border);border-radius:7px;margin-bottom:15px;font-size:0.95rem;font-family:inherit;background:var(--gray);color:var(--dark)}
.form-success{background:#d1fae5;color:#065f46;padding:14px;border-radius:7px;margin-bottom:16px;text-align:center;font-weight:600;border:1px solid #a7f3d0}
@media(max-width:768px){
.hero h1{font-size:2.2rem}
.section h1{font-size:1.85rem}
.article-page{padding:26px}
.article-header h1{font-size:1.85rem}
.tools-grid,.articles-grid{grid-template-columns:1fr 1fr}
.tool-page{padding:26px}
.section{padding:60px 0}
}
@media(max-width:480px){
.tools-grid,.articles-grid{grid-template-columns:1fr}
}